Would Mustafa step aside for Mehmed ?
Im purely taking about show and not IRL history, I know in IRL history this brotherly love we see in the show probably didn't exist.
In the show Mustafa loves his brothers and keeps saying that he would die for them. And we all know Süleyman's preferred heir was Mehmed. If Mehmed were to survive and if Süleyman were to officially announce Mehmed as his heir (which he basically did anyways by assigning him to Manisa) would Mustafa accept that ?
Mustafa was fiercely and "lethally" loyal to his father, even when walking to his death he didn't betray his father. So would he accept his fathers wishes and accept his brother as the ruler ? Or would he revolt against that decision ? Or revolt against his brother after his father dies ?