I’m gonna be different, so hear me out: Gohan VS Invincible.
“A gorilla’s worst nightmare” would definitely be something Boomstick would call Frieza.
Not to mention it would coincide with Invincible Season 2 as well as Dragon Ball’s 40th anniversary. (And to an extent, Dragon Ball Daima depending on when it’s released?)
But… it’s probably King K Rool VS Blackbeard (Starting Season 11 off with Joker VS Giorno is a recipe for disaster)