If I'm the Angels, I'd market Kole Calhoun to open an OF spot versus relying on Pujols to play 1B so that Ohtani can DH. Pujols at 1B would be a disaster...that can can't bend over or move laterally at all anymore.
the other way to play it is to platoon Cron and Ohtani. They don't think too much of Cron, it seems (see Luis Valbuena pick up). Pujols can play 1B and DH. Ohtani is not going to be in the line up every day, and keeping Cron and Calhoun gives them some depth if Ohtani can't hit in the majors.
Oh, and I'm moving this to out of town.