There is not a single thing hinting for that, and if he would eventually be Death, why would he have a punny mask shop in OoT?
And I don't think it would help to make any sense out of anything.
Death is a cool character in Castlevania, but I don't think it would fit Zelda.
Also, Majora is...
That sword has made me think about a lot of stuff...
Theoritacally, in the Adult Part of OoT, Link never went to Termina, and the moon probably crash landed into it.
But... what if the moon never came downin the adult part of OoT?
I'll explain: when you exit the temple of time in the adult...