Origins? Honestly I wouldn't be too surprised if wee didn't get any more. Between Minsc and Helia (probably) being scrapped as origins, I wouldn't be too shocked if Karlach was as well. Honestly if she was the only origin character left to be added, I would have expected Larian to put her in EA by now. The fact that Larian is hyping non-origins party members before her is mildly concerning.
I would be surprised if there were no more origins. Larian has been very tight-lipped, and as I didn't follow D:OS1&2 releases I don't know how usual or unusual it is. In my view the game awards trailer clearly played into it being a Baldur's Gate game - two classic companions revealed plus titular city, some classic spells and monsters. They even teased CGI Minsc before the show. I don't think it was a good place to reveal a new companion.