And other WB toons! 
Let’s see, who should be cast as Sergeant Zim – Elmer Fudd or Yosemite Sam? Whichever gets Zim, the other gets Jelal! And Porky Pig as Lt. Racznak!
I think you could actually make a good movie by concentrating on the minutiae of Heinlein’s description of the action. Heinlein himself was always amazed at the way his highly controversial book continued to “sell and sell” (See, for instance, his letters about it in Grumbles from the Grave.) I think a big reason for it is the incredibly detailed and believable way he conceived and described the hardware, behavior, and tactics of his Mobile Infantry in the book. Heck, he invented a completely new form of military branch in that book, down to hardware, tactics, training, and traditions. Most of that is utterly convincing. I think that this is what kept people coming back, re-reading it, and telling their friends. Even if you asbhor the philosophy he expounds, it’s a fascinating and compelling read.
Even though they made Verhoeven’s film, and Tippet’s sequel, and apparently a new one coming up (not to mention the CGI “Rough necks” series, the anime of the same name, and the Space Marines in Aliens, which are pretty obviously taken from ST), no one seems to have really depicted the setting as Heinlein imagined or described it, especially those wonderful powered suits. I can understand why they didn’t try to do the suits – YOU try to be the actor emoting away in there, or the director trying to capture it. They stripped the armor off to show the people, and thereupon stripped away the very reason for the MI being the way it was. I really do think you can depict it as Heinlein drew it, and show the working of the military mind inside those suits, as he describes it so well. (Read the end of the book again – there’s a huge amount of description of what’s going on, and how, and why. It’s not just “window dressing”.
At any rate, the film deserves to be remade to eliminate the absolute howlers in science, technology, and simple common sense the film displays. Heinlein musta been spinning in his grave at the depiction in a film supposedly based on his work that had so many basic and stupid errors, many of which he’d explicitly railed against himself (like that utterly stupid and unbelievable near-collision with the Big Meteor, which is wrong on so many levels, and shoulda got Carmen drummed out on her ass.)
Actually, you don’t have to remake ST. Just go a little bit further back and make a version of his juvenile novel Space Cadet. It hasn’t been done yet, it’s philosophy isn’t so abhorrent to so many people, and you get to cover a lot of the same ground. Change the title, though – it’s picked up too many associations over the years. (There was a bit of a connection between Heinlein and the TV series “Tom Corbett, Space Cadet”, but not as much as some folks think. Apparently some of the story bits in the comics and other media were drawn from Heinlein’s book, but nothing in the TV series was. Go to one of the Corbett sites for more details. But The Tom Corbett series and its spinoffs doesn’t resemble Heinlein’s setting very closely at all.)
Put them next to the big pile of dead baby bones, and no one should notice a thing.
Anyway, to reference CalMeacham’s point, as a TV Tropes entry says, “One critic mentioned that to adapt Starship Troopers was completely pointless, because ‘somebody already adapted Starship Troopers. It was called Aliens.’”