Bioware has sent out a new trailer for Mass Effect: Andromeda and multiplayer. Platinum difficulty will be added soon according to the video, but what is most interesting is that it closes with a Batarian, a race that was not present at all in the single player campaign.
According to the lore of MEA, Batarians are not present on any of the Arks, at least as far as we know. The only Ark currently missing is the Quarian Ark that is said to also have Volus, Drell and Hanar aboard as well. Where Batarians come into play remains unknown. Perhaps a future lore piece about the next multiplayer mission will be added soon to provide insight.