I don't think Felix would be signed permanently considering Atletico Madrid ask too much money for his transfer fee. Maybe he would be loaned again. If he doesn't then I think Morata will be the leaving one. Maybe he would return to Italy if there is still interest from there.
Joao Felix couldn't do anything when he was returned by Chelsea, in fact his arrival was not well received by Atletico Madrid so that he will be a loan player again at another club next season. In fact, Joao Felix's fate was not so fortunate that for 2 consecutive seasons he had to be at a club whose status was not fixed, only on loan. I know Joao Felix is doing his best but his current condition and high wages make it difficult for other clubs to borrow or make him a permanent player.
Joao Felix future is still uncertain that previously he was linked to Barcelona especially after Ousmane Dembele left that some people were predict Xavi will bought him as the replacement of Dembele but apparently this rumour wasn't true because Xavi has been confirmed he wouldn't considering to bought Felix this summer moreover Dembele and Felix has different style of game so Xavi feel Felix is not suitable as the replacement of Dembele
But besides that because Atletico giving high price tag to Felix appoximately 80-100 millions so that's why most teams who interested to him eventually withdraw because the price is too high and regarding loan option probably if there are no teams who showing their interest to Felix until at the end of this month then Atletico maybe will thinking to loan Felix to other clubs