Alvaro Morata has been one of the most rumoured players to leave at Atletico Madrid. The rumours have been coming from everywhere like from European teams to Saudi Arabian teams. But still there is update on that lately. Felix's returning to the team has raised these rumours. Felix is also in these rumours so maybe one of these strikers can really leave before the transfer window closes.
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.
These rumors have been circulating for a few days but there is no clear certainty regarding these rumors because Alvaro Morata is one of the strikers who is quite good and his contract for Atletico Madrid is still one season while Felix himself still has 4 seasons remaining on his contract.
If really want to expel one of the two players myself I am more inclined for Alvaro Morata to go and keep Felix.
It would be a shame if Felix had to be loaned out or sold again because he actually has good potential for the development of Atletico Madrid.