Amalgam is a combination of the DC Universe and the Marvel Universe. It was originally unsuccesful but the relaunch will be very different.
One of the many Spiderbat comic books. This series features a combo of Spiderman and Batman. Main villains include the Green Joker, Raa's Al Smythe, and Dr. Frozeapus.
Super Iron: Avenger of Steel
The series features The Lex Monger, The Mandaraniac, and Fin Fang Doomsday.
Another Spiderbat series, introducing Boomerazs, Killer Rhino, and Hushmeleon.
Green America: Emerald Soldier