These are the sites I was referring to:
http://www.killermovies.com/forums/f77/
Cross media versus battles are currently banned [Only comic vs. comic, video game vs. video game, star wars vs. star wars are allowed] since they caused massive flame wars for the brief period of time that they WERE allowed.
http://www.narutoforums.com/forumdisplay.php?f=51
http://forums.comicbookresources.com/forumdisplay.php?f=25
(This one is famous for "CBR Silver Surfer", similar to GameFAQs Flash or KMC Phoenix)
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"Give him a fair trial. Then shoot him." - Napoleon Bonaparte after the capture of Andreas Hofer