Well, this comparisons don't usually end well, it's true that him, and many players before him had a fantastic potential, and many people believed they could become the new legends of football, thing is that after some years they make people lost their enthusiasm about them, probably because we talk to much about this particular issue, and that may cause negative effects like pressure or creating an high ego on the players.
He has almost everything to be a legend, let's see if he has the mental structure required to be it.
PS: Players nowadays can't stand out so much, because there are much more professional clubs, and the quality is much more distributed, so that may also be a reason not to see a new Pelé, Eusébio or Maradona.