Personally I think Maddison will have a much better career than Nathan Redmond and either Murphy twin. I doubt we'll see Maddison back in this division before he is 32.
Probably see Jacob Murphy back in this league on loan in about 2 months time.
I think Maddison will end up having a career like Bellamy, probably grab himself a few England caps. As long as he doesn't do his knee properly.
Developing a good partnership with Vardy won't do him any harm when it comes to getting England recognition.
If we're trying to find an overhyped and over rated young player though then Jack Grealish would be top of my list, oh and I never rated Jacob Murphy. Still think Josh is the better twin, and I think Josh is bang average!
I do think Sessegnon at Fulham is the player from last season who will reach Dele Ali / Harry Kane levels though, doing what he has done at 18 years old and having his pace as a left footed player. He'll become what people were hoping Luke Shaw was going to be.