@King:
He doesn't have to be "fodderized", you know.
Chinjao also wanted to pay back Luffy and got defeated in the end. Hell, all of them want to pay back Luffy, but that didn't stop Suleiman and Blue Gilly from getting defeated with little problem, and Ideo hasn't been shown to be any more important or developed than those 2.
But hey, Oda can make Ideo defeating Dellinger work well, I just don't really feel it because of how Ideo has been portrayed so far
Chinjao out of his prime, so it's understandable if he got defeated, but Ideo become 2 time boxing champion for a reason, he will beat Dellinger for sure.