There wasn’t one. As my wife put it, “What the hell, Joss? You trained us to sit through ten minutes of credits. You rung the bell, we’re sitting here drooling, and there’s no pay off!” She wasn’t happy about that.
Well, Joss was very up front about there not being an end-credits scene. He’d been saying it in every single interview he did for the movie, so anybody who waited in vain did so because they weren’t paying attention.
Right. Something in the style of…
NICK FURY
I don’t know about that, but it is powered by the cube. And I’d like to know how Loki used it to turn two of the sharpest men I know into his personal flying monkeys.
THOR
Monkeys? I do not understand.
STEVE
I do! I understood that reference.
Tony rolls his eyes, while Cap looks proud of himself.
That assumes that you seek out interviews with Joss Whedon, rather than just, you know, going to the movie.
If you just, you know, go to the movie then why were you expecting a button scene? Seems like that would be something you would only know about because you paid attention to the information available to movie-goers that is everywhere. 
I had to pee so bad it was all I could do to wait for the first scene. I was so, um… relieved when people started getting up so I could, you know, go.
Because it seems like every third movie released these days has one, and the previous Avengers movie had one. It’s like the thing to do these days, and the Marvel films have done it a lot. I don’t blame people who have been burned previously by not staying to the very end to catch that funny little scene of the Avengers eating shawarma or seeing that Tony Stark has been baring his soul to a bored Bruce Banner, for staying to the end, just to make sure there isn’t one is this movie as well.
I don’t really think movies should require the audience to do advance preparatory research before buying their tickets.
So you’re saying Marvel now has an obligation to put in a button scene, even if they can’t come up with a good one? Or should they put up a notice “THE PRECEDING THANOS APPEARANCE WAS THE ONLY MID/POST CREDITS SCENE IN AGE OF ULTRON. THERE WILL BE NO FURTHER SCENES, HUMOROUS OR OTHERWISE.”
No. Just that people who do stay to look for one shouldn’t be criticized for doing so.
The fact that I was one such person has no bearing whatsoever on this discussion. 
But I absolutely reject the premise that because I did not check out every interview Joss Whedon did before the release of the movie, this means that I “wasn’t paying attention.”
Chronos came up with one, so I’m pretty sure Whedon could have.
And…yeah. “Undead Monkey” scenes (per Pirates of the Caribbean) are like sprinkles on a doughnut. We’ve come to expect them. They’re a thing now. Don’t take them away.
(I also love Jackie Chan style “blooper” bits. I love buying movies that have bloopers as part of their bonus features, and I feel ripped off when those aren’t included.)
Don’t ever tell the customer he’s wrong in what he wants.
I watched with my son and got my own “you didn’t see that coming” moment. When Ultron cuts the arms-dealers arm off. He asked why did he do that? I answered “really? His name was KLAW! You didn’t see that coming?”
And I loved the call-back to Avengers with Iron Man sucker punching Hulk 
I didn’t see any interviews with Whedon about the movie beforehand because I had been making a conscious effort to deliberately avoid spoilers. So yes, there was a reason for a dedicated fan to not know about the lack of credits scene.
Oh, and another point I wanted to add: I thought that Wanda was hot enough, and her acting was good enough (both things I could say about pretty much everyone in the Marvel films, actually), but I thought that her brother was a much better character than she was. I think that this is at least partly because mental powers are by their nature somewhat personality-defining, and so the character without the mental powers had more flexibility in defining a personality: Wanda can decide that she trusts Vision because she can read his mind, but Pietro needs to see SHIELD putting it on the line to rescue civilians to decide that he approves of them.
Really liked it. I liked the first one better, but I think that’s just because it was fresher. Ultron’s plan made more sense to me than Loki’s. I enjoyed that they had the old Cap/Quicksilver/Scarlet Witch/Hawkeye line up briefly. (Featuring Black Widow.) It was just what I wanted from an Avengers movie. I hope we see the new line up in action during Infinity war, or another marvel movie.
I felt like I was missing things because I haven’t seen S2 of AoS yet.
All you really missed was:
1. Where Fury got the helicarrier
2. How the Avengers knew about Strucker.
Both of which were dealt with on AoS.
For spoiler-free info about mid- and post-credit scenes, I go to http://www.mediastinger.com/ . I’ll often look it up on my phone during the pre-movie ads. Useful site.
No, I watched the movie because I started watching an episode of AoS where they mentioned Ultron right at the start, so I figured I’d better watch the movie in case I needed to, to follow everything that was going on.
And no, other than that one line at the beginning of the episode, there was no connection in either direction.
It was pretty clear, watching the movie, that the script was written without taking into account the amount of time that would be lost to action sequences and/or that they had a certainly laundry list of characters and plot points which had to happen, for future movies, that was much too large to reasonably fit into the duration of a single film in a reasonable manner. There was a score of things that were unexplained or which seemed to reference deleted scenes. I’d probably estimate that at least half the original script ended up either never being filmed or ending up on the cutting room floor.
It’s really a pity. The TV show would probably be the best and easiest way for Marvel to advance the overall storyline of the MCU, and instead they try to pack a season’s worth of character introductions, cast changes, conspiracies, etc. into a single movie just to then have to cut it down so egregiously that you don’t actually have any idea what or who anyone is. Granted, it’s a comic book story, so it’s not all that hard to piece together the plot points, but sympathetic characters aren’t made by plot points.
With something like 20 hours of TV per year, they could set up all manner of special events, introduce new characters, really build up an amazing global issue which needs to be dealt with, and then leave the movie to handle the big, amazing SFX bonanza. Granted, you might not be able to feature Scarlet Witch or The Vision on the TV show, because of budget constraints and the amount of CGI that their powers would require, but then just don’t add those characters to the MCU. There’s no value in adding characters that you can’t justify spending the money on to give them their own movie nor enough screentime in a shared movie to give them a personality.
Because other movies, including other marvel movies have one.
And personally, I would love a screen that pops up to say, “Nothing but credits left, start pulling your jacket sleeve out from under the guy sitting next to you.”
I also think Captain America should use more old timey expressions, like… ummm… “You bet your sweet bippy” or “wait just a cotton-pickin’ minute”.
“You bet your sweet bippy” came from Laugh-In in the late 1960s. He would not know that one.
And even then it was indirect and implied. They don’t outright say those things were what the TV Characters were taking care of, they just imply it (unless I missed something when I watched the Finale).
Edited to make my statement more general to remove a spoiler if you haven’t watched AoS yet.