We're trying to get everyone's favorite ancestries into second edition as quickly as possible, but that will be an ongoing process for a while. Let us know what ancestries you want to see and we'll do our best to get them in as soon as we can!
One of my most wanted, lizardfolks, is already on the way so I'm hoping to see tengus, kobolds and ratfolks next.
Unlikely as it is, I'd also like to see gnolls ancestries. I don't really think that would be a very popular choice though.
I've also had a weird fondness for troglodytes since I saw the one playing dice on the Monster Codex's cover, so I guess I'd like to see that too.