The possibilities have been burning up Twitter under the #disneymarvel hashtag. My contributions:
"The Submariner's Showdown at Splash Mountain!" "Peter Parker: The Spectacular Spider-Pan!" "Ant Man: It's A Small World After All!" "Aristocats Assemble!" "To the Infinity Gauntlet... and Beyond!" "Mickey Mouse, Sorcerer's Apprentice Supreme!" "The House of M.M. - the Magneto Mouse Club!" "Face it, Tigger, you just hit the honey pot!"
And of course, the inevitable showdown between Scrooge McDuck and Norman Osborn.