My list of my favorite fight of each season:
Season 1: Starscream vs Rainbow Dash
Season 2: Godzilla vs Gamera
Season 3: Roronoa Zoro vs Erza Scarlet
Season 4: Naruto Uzumaki vs Ichigo Kurosaki
Season 5: Samurai Jack vs Afro Samurai
Season 6: Ganondorf vs Dracula
Season 7 (so far): Leonardo vs Red Ranger I (Jason Lee Scott)
I don't know... Maybe? Though it does look like spoilers:end of spoilers is getting shot toward another planet at some point. Or perhaps the exploding planet is the finale of the fight, since (I think) one of them can fly through space while the other... can't.
Hulk