Cross-Over Live Action films based on comics from different publishers - Thoughts?

Hey guys and gals, what are your thoughts on cross-over live action films based on comics from different publishers?
What two universes do you want to see collide in a live action film?

I would like to see a live adaptation of the Avengers, Spider-Man and The Guardians Of The Galaxy taking on the Titans from "Attack On Titan" along side Eren, Armin and Mikasa and others in a grand EPIC battle in New York City. The cross-over comic did a great job with the story and the action.

Also, a film where DC and Marvel characters meet would be awesome too. Just like in the comics.

That is some impressive editing there.
Some of these fans got some real talent!