I think alot of the posts in this thread are silly. First off of course both Gnomes and Halflings are in, as well as at least the main elf subraces, perhaps all of them. All the PHB races are going to be in the game, so posts saying we don't need both Halflings and Gnomes are pointless. And just be cause both races are short doesn't mean they are interchangable. Making sure all the PHB content that they can tranlate to a CRPG has been made clearly a priority, races, subraces, classes, subclasses, backgrounds, ect...

Now moving onto none PHB races, we already know some are going to be in, Githyanki is confirmed, which makes Githzerai extremely likely as well. Aasimar are very important to the Forgotten Realms setting and they have a long history in FR, including in some of the best CRPGs, like Neverwinter Nights 2 and Icewind Dale, so extremely likely to be in. And it doesn't matter if you think they shouldn't be in, because at thispoint odds are its a moot point. Genasi are likely in as well for the same reason, although hopefully Larian fixes their mechanical issues.

Beyond that it gets harder to pick, although I think Goblinoids (except for the Verdan), Lizardfolk, Orcs, Goliaths and Tabaxi have a really good chance of being in, but they are much better targets for debate because they are not as close to being certain to be in as the other races I've mentioned are, so use this as the starting point for debating instead of races that are pretty much far gone conclusions.