To me, the sweet spot will be finding a sense of simple awe and wonder from the originals — finding a way to make kids as excited as adults (and vice-versa) and that doesn't smack of a commercial ploy to introduce yet another cute set of toy-ready races/robots.
I think Abrams can capture the whiz-bang and the actual writing skills that Lucas fumbled in the prequels. The question is, can he find the emotional heart?
4 Rules To Make Star Wars Great Again: An Awesome Animated Open Letter To J.J. Abrams [Video]