I think Arda should seriously consider going to another team like Nico Paz instead of being a substitute for his own future. He has the talent to be a starter in most teams he goes to today. The last I heard was that Xabi Alonso also wants him. I think he can try his luck at Leverkusen on loan in January.
It can happen if the player wants and the club also wants. But Madrid has made a statement that Arda Guler will continue to play in Madrid, which means Ancelotti still needs him as part of the team's plan. He still has a little chance to play, he is still young and I think Ancelotti will give him more chances in the future. For now, he is fine in Madrid, maybe it would be very good for him to be the first choice in the squad that he can get in another club. But being a young player in the Madrid squad will not be easy.