1. Iron Man Vs. Magneto
2. Juggernaut (Or Colossus?) Vs. The Thing
3. Storm Vs. Thor
4. Spider-Woman Vs. Gambit
5. Ms. Marvel Vs. Rogue
Like Thunderdome, only with more explosions and less outlandish costumes. Marvel is pitting it's two best teams against each other starting in April 2012.
Editor's Note: This seems just a tad unfair to Mr. Stark.
Editor's Note: Of all the mash-ups, this one makes the most sense.