Putting NXT as one of the three hours would feel out of place. Raw is the prime time show, highlighting rookies and new talent that the vast majority of the audience isn't even aware of would probably spell death for the ratings in that hour.
Otherwise, this sounds like another average episode of Raw to me, considering we typically see the same people on Smackdown and Main Event as we do on Raw (as you would expect, as there's no brand split anymore and it's all just one show now.) The idea of having a special episode kind of went out the window with the three hour format as it means there's no such thing as a Supershow anymore. The closest we have now to a unique episode is Old School Raw. Unless they go all out and do something like a Raw where every match is a special stipulation or a Raw where every championship is on the line that night (though that's taking the gimmick for Night Of Champions.)