He would be one of the biggest "faces" on the roster if Enzo beats Kalisto in the pre-show and Neville comes in, in street clothes, jumps over the barrier, kicks this dude and hits his finisher and then runs through the crowd while "security" tries to get him.
Have him come back on Raw and do the same thing and then have him escorted out (not arrested) only to have him come back and beat up Enzo backstage when he's talking to Angle about security. Play the ambiguity of his situation up as much as you can.
But with WWE I doubt that would happen