Joao Felix is going to play for Barcelona by earning only 400k pounds for one year. This is a really shocking amount to me honestly but he doesn't seem to be uncomfortable with this. Because he has captured an opportunity to play for his dream team and he won't be a part of a team in which he isn't wanted for a year least.
After that I don't know what will happen to Felix. Maybe he might be a permanent member of Barcelona depending on his performance. But I don't think Simeone will ever change his mind about him.