I saw Pitch Black and he was fitting there but as Santiago he is in my opinion a really bad choice and that Santiago even has another last name than in the explorer notes is for me something that should not happen.
Vin Diesel as a totally fresh character I actually wouldn't mind that much.
I really hope he will not be in the game at all and it really is only a trailer but I doubt it, cause he will also be in the animated series and I think they will use a "comic" Vin Diesel version there. I fear they changed to much there too and as it seems there will be no Diana in it who is after Santiago the most liked character of mine in the Ark franchise.
I know a lot of people don't mind stuff like that and that is ok, but for me things like that are a big put off.