Deadpool vs Boba Fett: Mercenaries, by Marco D'Alfonso
Deadpool and Boba Fett vs Disney World, by Marco D'Alfonso
Deadpool and Boba Fett: WILDBOYZ
Tarzan of the Ewoks, by Marco D'Alfonso
Last Man Standing by Ed McGuiness and Jason Martin
Most of these crossovers, save the last, are from talented fanboy Marco D'Alfonso. You can check out his Deviant Art page here.
The last image is from professional comic book artist Ed McGuinness.
And once again, just so I'm clear, every creative property shown in these images is now owned by the same entity. Disney would only need the lawyers to come in once the ran out of non-lawyers to count all the money.