User blog comment:IronPal42/Help to my next DBX ideas/@comment-36289468-20180722171747

Sonic: Quicksilver from Marvel. Both are speedy, cocky and have died in at least one continuity/game. There is a WIP, but no matter.

Green Lantern: No idea.

Kenshiro: Jotaro From JoJo's Bizarre adventure. Check the death battle for details. I'm surprised nobody's done that already.

King DeDeDe: Weiss Schnee from RWBY. Both are rich, monarchs (I think) and are members of a quartet (Team RWBY and Kirby, Bandana Dee, Meta Knight and DeDeDe respectively).

Ultron: Braniac from DC. Both are superintelligent beings that went toe to toe with an entire superhero team numerous times.