Veltharis ap Rylix
Legend
Mostly just speaking in the hypothetical - an updated goliath with the full range of giant ancestry options would have been thematically appropriate for Bigby's in the way the variant dragonborn were for Fizban's.We already have a rundown of the contents of the book, no playable Species at all.
Presumably the '24 goliath came to be too far into the production schedule to reallocate page space, make additional art orders, etc., and the fact that they've also been earmarked for the '24 PHB makes it less necessary to try to fit them in now.