Actually, DC and Marvel do have a few mashups. I haven't read many, but they mix characters into the same stories... basically this guy is able to cross over universes, and some characters from Marvel hop into the DC universe.
XD hahahahahahaahaha dude your comment just made my night! Don't worry the update will be up in like 12 hours...ish. It's already Friday my time, but I need to go to sleep, so today afternoon it'll be up.
0.O
:']