From what I've encountered (at least in the sane side of the Dragon Ball fandom) people love learning about OCs so I feel like their would be a demand! Although, I feel their would be a bigger engagement on twitter compared to here.

Have you ever considered doing a Q&A of your characters? Also, your OC's feel so perfect for a Darkstalkers game!!

Maybe not all the way, but enough that it could be a funny little reference.

I think the Assassin Creed look is perfect. Especially with how the assassin’s have their eagle vision, their mystical artifacts being pieces of Eden, and their bleeding effect being memories of their ancestors sort of like Hawkman’s constant reincarnation. If anything, you could push it further