It’s most likely going to be Linda Yaccarino, the current head of advertising and partnerships for NBCUniversal. I wish I could say with certainty that it’s her, though the deal doesn’t seem to be totally done. The Wall Street Journal is reporting that she’s “in talks” for the job, and Dylan Byers of Puck says Musk “plans” to give it to her.

https://www.theverge.com/2023/5/11/23720648/twitter-next-ceo-probably-linda-yaccarino