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 don't know who the downvote came from, it just appeared suspiciously quickly. Apparently some people are trawling this thread for dissenting ideas that do not conform to the herd's opinion.
I'm sure Ubisoft had some sort of consultants about cultural and historical matters, but their involvement in production of the game and marketing is dubious at best. It still fucks me up that anyone thought it was okay to use a destroyed cultural/religious object as marketing material, even without knowing its connection to the Allied bombings. I maintain my position that Ubisoft is exploiting these ideas callously and arrogantly and should not be given the benefit of doubt.