Might never happen under Pep the way it's gone.
I doubt highly that we'll ever win it under Pep. I wouldn't be at all surprised if the next manager wins it in his first season, though the chances of him being as good in the league as Pep or sustaining the success for as long are slim to none.
Christ, if Pep let a bloody fan vote decide the starting XI in the Champions League knockout games we'd probably have won it by now, as every defeat under him in that competition is proceeded by all of our fans correctly predicting that his team selection will fuck us over.