Where did you get the idea that there will only be 6 or 7 companions? We already have 5, they will be adding more, but they have never said or implied that they will only add 1 or 2 more. For all we know there will be 12, 1 for each class.
My personal estimation when looking back at the older Larian games. I just don't see it happening, having more than 10 origins characters with backstories, as complex as DiV2, in this game (not to mention the huge voice acting costs). I do think that twelve companions are a complete pipe dream.
