No new companions besides Halsin and Karlach is expected. But so much for Larian nit including good companions to get more feedback on the usually less popular evil ones...
Edit: Ok, there is 1 more. I wonder who....
Yes - Minsc was datamines early on as potential origin, so it is not impossible that much has changed when it comes to actual companions. Or maybe thirst of Helsin/Minthara made them do those instead.
