I hear rumors, that Lewandowski still can play in Munchen for at least 1 season because the official didn't reduce the price of the transfer. Barcelona can't make deal with that price, even 5 million bonus was added. but I think 50 million euros is enough expensive for a player getting old. If I were Barcelona, I have to wait until the next session after Lewandswki's contract was over and got that player with a free transfer.
These are not rumors, but the official position of Bavaria (another thing is that at some point in time they may agree to a smaller amount than requested). But I have a suspicion that due to Lewandowski's behavior, this issue has become a matter of principle. In this case, he will either have to play for a year or sit on the bench. As for the expectations of Barcelona, it is not known what form he will be in a year (although if the crisis in Barcelona continues, it is possible that it will be happy even the old Lewandowski 
).Lewandowski will stay with the Bayern Munich team and he will try to maintain his form. Lewandowski is a professional player, he will not intentionally play badly. And if Lewandowski is with the Bayern Munich squad, he will be the key player in the squad. But I wanted to see Lewandowski in Barcelona. However, this possibility seems very low. A few years later, I don't think Barcelona would be interested in a 34/35 year old player.