We have a helluva schedule starting in 2 weeks with Messi and Neymar without training yet. Not to mention toughest first part of the season I've seen in last decade (visiting all tough opponents this Autumn).
Keep Pedro until January and let him say goodbye with World Club Cup.
We'd unlikely be able to sell a cup tied player to a club good enough to sign him. If he stays he might as well stick around until next summer when hopefully Munir and Sandro are ready to take the torch full time.