But I think this will not happen considering that Arda Guler just got a new jersey number at Real Madrid and he has been wearing the number 15 jersey previously worn by Valverde. So it is certain that Arda Guler will be prepared by Ancelotti to get more playing minutes at Real Madrid.
I know that young talent seems to be in great demand by big teams and Milan is the first team that I know of that is interested in bringing in Arda Guler. But from the start it seemed like Real Madrid would not let him go even on loan. So I think Leverkusen would be better off looking for another midfielder or right wing considering the chances are very small and even if they are still interested, it would be better to try next season when there are changes that require Arda Guler to leave.
It could still happen, if Àrda Guler chances of getting more game time would be reduce ( Which will be reduced ), he'll have no other option but to accept the move to Bayern Leverkusen. Working with Xabi Alonso would be great and I believe in two to three years ahead, the both of them will be working again together for Real Madrid, so it's a win win situation for them.
Considering the arrival of Endrick and Kylian Mbappe, with the likes of Vinicius Junior, Rodrygo, Brahim Diaz and Jude Bellingham, I don't know if they'll be able to make up chances for him to play but it's up to Àrda Guler and Carlo Ancellotti, they'll need to have a man to man discussion prior to the new season to avoid disappoinment
Xabi Alonso needs depth ahead of his first Champions League Competition campaign with Bayern Leverkusen. I'm happy for him and hopefully, he'll finish strongly above everyone on top of the group stage in the Champions League Competition and getting to the Semi finals if possible. He has what it takes to do that.