Yeah, we already knew that Karlach and Minsc were coming (if you paid attention to the data mining) and Helia seems to have been replaced by Jaheira, which I’m cool with. I thought y’all were saying that more companions would be revealed. That is something I am certainly not expecting.
I knew about the datamining, but I don't know who in this forum wants to know about datamined content. Some people don't want to be "spoilered" by datamining, so I linked this interview instead, as an official source.
There is another, more recent interview with Swen Vincke in a german gaming magazine, where he confirms that Minsc and Jaheira can be recruited as companions, but can not be played as origin characters. They can also become antagonists of our player character.