Marvel vs. White Martian Invasion
Basically everyone on Marvel Earth below Surfer against a secret invasion by the White Martians from DC.
Scenario is parrallel to that of the White Martian's first invasion of DC Earth. If you haven't read it, I'm sure there are some people who could explain it better than me that would be willing to.
White Martians are alot like Martian Manhunter, meaning they have power levels very similar to Superman, including flight, super-strength, invulnerability, invisibility, intangibility, shape-shifting, Martian vision (similar to an optic blast), and high level telepathy.
There is a total of 70 Martians in the invasion force. Their ultimate goal is to control and/or destroy the planet. Could they do it?