There are clearly 8 Origins in the game that are pretty far progressed in development + others have found 3 being mentioned once but with no additional data, so I guess this might be included or not. and here https://www.reddit.com/r/BaldursGate3/comments/jd1qsq/highlights_from_kevin_vanords_stream/ we get the confirmation that there will be 8 companions just like I said.