Previously it was confirmed as 2-5p, see Matt Riddle's reply here. Unfortunately on the BGG stream during Origins, Stephanie mentioned that the game supported 3-5p and there was no denial on that from the designers, see https://youtu.be/ZQUQLwyrAcQ?t=820 Though this could be due to them being entranced by Stephanie's overwhelming pressence
So at the moment I'm just waiting for the definitive player count confirmation. But from what I've been able to gather regarding gameplay and mechanisms, even if they stick to 3-5p, it shouldn't be too difficult to adjust to 2p. I know I'll be getting the game regardless and make it work for the two of us.