#1 An invasion
When Wade Barrett led a bunch of NXT rookies to interrupt the main event match between John Cena and CM Punk on the 7 June 2010 episode of RAW, no one knew what was coming.
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The group, which identified itself as The Nexus, interrupted the match and attacked everyone in sight - even including the officials and the timekeeper. Such an angle garnered massive heat and propelled Nexus as one of the most dangerous groups in WWE history - or at least it seemed so. WWE messed up the storyline and derailed their momentum with bad booking.
WWE may want to repeat a similar storyline, and this time, do things right. With Triple H leading the pack of wolves from NXT, we may see an invasion angle that could be perfect.
The four new call-ups, along with a few more could form a strong alliance and invade both RAW and SmackDown LIVE - building up an intriguing storyline by the time SummerSlam comes around.