Long before the nWo, Dx, and other groups in the Attitude Era, there were groups sprinkled around wrestling that supported one another. Sure, the groups above helped rejuvenated wrestling in the late 90s, but I am not sure if they would have been as popular if there were not groups such as the Four Horsemen, the Mega Powers, and other groups in the late 80s and early 90s.
There is still something cool about seeing the superstars of the company team up and take on each other. I know this is a singles driven company, but would it hurt to see Orton and Cena team up to take on Del Rio and Henry? Pay per views in the late 90s featured Austin and the Undertaker taking on Mankind and Kane and that was the main event!
It was cool to see the Horsemen walk out to the ring and surround the ring and intimidate their opponent with their presence. Flair's promos were fantastic during this time and the aura of the Horsemen and other groups provided much needed spark on certain nights.
I am not saying that it has to be every month, but with the struggle in developing tag teams, this might help some younger teams get over with the fans, and bring some stability to the division.