I doubt they would build around him at all. They have KDB who is the best midfielder in the world arguably, you think they're going to adjust how he plays in order to accomodate Pogba?
No chance this is happening. If there's anyone Pogba resembles it is Yaya Toure, who Pep had issues with because he didn't run enough. Moreover, why would they pay him 400-500k a week and ruin their wage structure? They also have KDB, Bernardo, Gundogan and Foden all play in a similar position to him. If there's a midfielder they are signing, it is defensive one to cover the loss of Fernandinho.