Yasuke is actually a fantastic choice as far as history/narrative goes.
A shame the game looks like more generic Assassin's Creed Mapfucking+Crowd Supermurder.
Which is fine if that's your thing, but I haven't been thrilled by an AC game since... well, AC1.
I mean, you were a super flamboyant Renaissance guy with dual wrist blades murdering dozens of mooks per encounter as early as AC2, and by Brotherhood and 3 it only got more overt.
Well you just described half of Italy there!