I dont see how the new power Luke could be anything other then NR. Luke, JM should in theory be more powerfull than any of the Rebel Lukes right?

In most of the EU books Luke doesn't really seem that powerful. As a Rebel he was a little more reckless and had less control. It might be appropiate for a rebel Luke to seem a little more powerful than the Luke, Jedi Master.

Now in the new Legacy book series we are starting to see just how powerful Luke really is. I think we'll see a very powerful Luke in the Legacy release next year.

P.S. The Luke that I want to see more than anything is the darkside Luke from Dark Empire. Luke and a Emporer clone in the same squad. That would be awesome.