Barca maybe, but don't think there's any chance he manages Spain, either from his feelings or those in Madrid about him.
I'm not sure Pep would actually make it as a national manager. If you look at how players struggle in their first season, he needs time to get them to play how he wants which I don't think would be possible with a national team, apart from maybe Spain due to the Barca contingent.
Think international football works better with kick and rush managers with simple styles. In unrelated news, could see Klopp managing Germany when he leaves the scousers by mutual consent...