Made a Kuuga-like (called Choga FTM) that has forms based on Flash, Supes, Shazam and Cyborg (thanks to gokushufudou for the idea there)

Also am workshopping a few others: A Wizard Rider based on Zatana, a Wildcat Rider (undecided who to base him off of), A Zi-O Rider based on Hourman (Complete with Ridewatch that can only transform for one hour a day), A Gazer-like Rider based on Mr Terrific, an Energy Seed Rider for Green Arrow (Cont)

a Black RX rider based on Nightwing (Since I used Batman and Owlman for Black and Shadow Moon)..

and a really unhinged one that uses the Dobbs version of Sandman in a Den-O system that makes Dream of the Endless a Raven Imajin (because I want Morpheus there to suffer I guess)

also made 3 Gavv-inspired TMNT riders earlier on

Man do I like me some obscure golden age heroes

excellent

I don't know, since Wildcat is a boxer, you might want a Rider who's primarily a fighter. Something like Shotaro, maybe. Or you could even do Stronger

I was thinking Showa...but since you mentioned boxing, maybe base it on Cross-Z

...actually thats now happening...I pictured his adapter running up like Ravage from transformers and folding up all nice and neat

Oh right, duh. Forgot about Cross-Z. That would be perfect, actually

Could probably have all of the Build Riders be JSA, tbh

hehehhe...his name is Ne-Cross. Im fuuunnnnyyyyyy XP