They will be mixed into the other races.
Geth go with the Reapers, or one specific branch of them at least.
Salarians are obviously part of the Council, as are the Turians, Asari and Humans, so you have the Council as opposed to the Alliance, Batarians I believe were replacing pirates, alongside the mercenaries. Quarians are with the Council, and Krogan may make some appearance in the council, but they have no space faring ships as a punishment alongside the genophage for the Krogan Rebellions. Collectors are also with the Reapers, as they have all along been just Reaper pawns.
Joccaren
Bla joined
This member has provided no bio about themself...