Pretty unlikely. He just moved her permanently from Benfica, dont think he'll settle for another stepping stone before moving to either of the Spanish giants.
Also he stated he feels absolutely at home in Frankfurt and it doesn't sound like platitudes. His career went off the tracks once already at a club without the right support, here he has five Yugos with which he spends basically every waking minute. If he leaves I'll be surprised if it's to someone not at the top besides he'd replace both Suarez and Benzema as is.