#2 The Undisputed Era
This possible scenario could be the best in terms of shock value.
Why not use a new top group on Monday Night Raw, The Club, to draw out the competition in the form of the top group on NXT, the Undisputed Era? Even better, if you want a really fresh spin on things, neither group would have to be “the good guys.” The entire feud could be based around both factions simply wanting to prove they are the best. Let them do what they do in the ring and let the fans pick their sides.
Plus, it gives the Undisputed Era an immediate direction and storyline to jump in to upon their call up to the main roster, something that most of the NXT alumni have not had lately once they arrive on one of the big shows. You want to "Shock the System?" This accomplishes that goal.