Serious answer - do my idea.
Five movies, all interlinked.
Take an idea like, say, Independence Day. But don’t do just one movie. That’s trying to cram too much. An event of that magnitude would have a million stories.
So, make 5 movies in five styles. Action, romance, comedy, drama.
One is the straight-up actioner telling the main story - ID4, for example
One is a personal drama of one family dealing with the alien attack on a local level - Signs would be the model, or maybe War of the Worlds
One is a “close in” movie about two lost lovers rekindling their romance while the war rages - modeled after Casablanca
One is a special mission, focusing on a small group - like Guns of Navarone
And the last is a broad comedy - think Airplane! level of humor.
Each movie MUST have all the main characters from the other four appear in it at some point, and the scenes must organically flow. And those scenes must be in BOTH movies, unaltered (though you can change perspective and camera angles). So a lead actor in one movie becomes a walk-on part in the others.
Like, the special forces guys in Guns of Navarone stop in Rick’s Cafe, they are seen in the background of troops at the end of ID4, etc. Rick and Ilsa are watching the war on TV, and you can see the President on TV. Things like that.
The hardest part would be integrating the serious movies with the Airplane! movie, but with clever writing, that could be fun. In the Airplane! movie, the dialog is gut-bustingly funny, but in the serious movie, the dialog is exactly the same but isn’t funny. It’s all context. Or you lampshade it. In the serious movie, after the Airplane! actors exit, the other movie characters say “what the heck was that about?”
I’ve been rolling this idea around since ID4 came out. I think it would be great, but you need a lot of resources. You have to film five movies at the same time, and balance all those actors going from one to another. Do your prima donna stars demand payment for EACH movie? A lot of details would need to be ironed out.
But I think the result would be awesome!
PS for a novelty - make one of the movies animated…