No. Pep's decision will be made (public) after the game against Hannover 96, most likely next week, definitely before January. Until then the media will go crazy.
It'd be strange if he announced he were going to City or United still have Pellegrini and van Gaal. I imagine Pellegrini will be moved to a role within the club though so it's probably reasonable to think it will be City and we will be left with The Philosopher.