Two mechanical dragons. What more do you fucking need?
Aquaman vs. Namor (DC VS Marvel)
Megaman Battle Royale
Black Widow vs. Widowmaker (Marvel VS Overwatch)
Captain Marvel vs. Shazam (Marvel VS DC)
Wario vs. King DeDeDe (Mario VS Kirby)
Ben 10 vs. Green Lantern
Weiss vs. Mitsuru (RWBY VS Persona)
Johnny Cage vs. Captain Falcon (Mortal Kombat VS F-Zero)
Aang vs. Edward Elric (Avatar VS Fullmetal Alchemist)
Lobo vs. Ghost Rider (DC VS Marvel)
Dragonzord vs. Mechagodzilla (Power Rangers VS Godzilla)
Sasuke vs. Hiei (Naruto VS Yu Yu Hakusho)
Ganondorf vs. Dracula (The Legend of Zelda VS Castlevania)
Mob vs. Tatsumaki
Deadpool vs. The Mask
All Might vs. Might Guy (My Hero Academic VS Naruto)