I think Nexus is pretty much dead now, but I think NorCal is right when he says if it is to continue then have Otunga as the leader.
He has the imposing look, the mic skills and the charisma to lead the group, and if other NXT rookies are added, plus the returning Skip Sheffield and Michael Tarver (who looked intimidating as hell with the bandana over his face) then they could at least get back to 5-on-1 beat-downs and the gang mentality which they initially had
Using the group attacks, Otunga could cover up his lack of in-ring skill and play the role of the "coward" leader perfectly, sending in his goons to do his dirty work, and winning matches due to the interferance of the others. I like this idea, as without something like this Nexus will just fade into obscurity.