I'm afraid there's nothing listed for this season. Add something here!
Samurai Jack VS Afro Samurai - S5-E9
Continuity mistake: After jumping right behind Jack, Afro attempts to stab him, and Jack avoids it. When Jack turns back to face Afro, it looks like there is a bit of distance between them, despite Afro being right behind Jack in the exact previous shot.
Nightwing VS Daredevil (DC VS Marvel) - S5-E12
Nightwing: Hah, see you in Hell. (00:17:40)
Trivia: Ben and Chad have stated in the past that if they ever do a series finale, that the very last episode of Death Battle would be between the two hosts of the show, Wiz and Boomstick.