It would make sense, especially as he was sealed before Zelda was revealed to be Hylia in mortal form. There had to be some war before then to lock him so its possible Ninty may do another game in that vein. I like the idea some people have, that Link is the Fierce Deity in mortal form, so perhaps in sealing Demise as she took mortal form,Link had to as well? Perhaps it was a neccesary sacrifice to negate his curse over and over? Which is why they all reincarnate