Revolution

The agreement with Disney and Warner Bros was that they could only use their biggest characters (Mickey and Donald, Bugs and Daffy) if the other corrosponding character had the exact same amount of screentime. This is why, in the movie, Bugs and Mickey are sharing scenes, and Daffy and Donald are sharing scenes.

It’s also worth mentioning that every single animator in the industry that wasn’t already working on something was called in to work on this film. EVERY. SINGLE. ONE.

Didn’t they also have lawyers going through the script making sure that the number of words spoken by characters from each company totalled the exact same?

Plus Porky Pig gets the last spoken line, but Tinkerbell closes the movie.

Also worth noting they were so strict about the screentime being the same that they had to have the exact same number of frames.