Drucillia
Yeah, but for Marvel, what about characters like Wolverine? He could just heal from Superman stuff. Plus, Wolverine is cool. And what about Mystique? She could make kick a** spy.
I say Marvel wins just with the X-Men alone.
Yes, but two things. 1 The Batcave opens over a volcano, and the Batman could, and would, easily drop Wolverine into said volcano. And 2 Wolverine can only heal from non-uber fatal wounds. Superman can just fry him with his heat vision for a couple of minutes until he croaks. Also, the Batman is instinctively paranoid, and would not trust anyone, ergo, Mystique would be a lousy spy. Also, the JLA has far more members than there are X-Men. They'd win.