Would WWE be smart enough to tie The Shield guys with being those SWAT guys that used to be follow around Heyman in ECW. I do not believe they ever revealed who they were. I know it was not those guys.
Do you REALLY? Maybe Dean Ambrose was just biding his time.
Much like 99% of the continent, I never watched WWECW outside of like 2 episodes, so I don't even remember those guys, and I don't think anyone else would either. It would be such an obscure plot point to bring up that I don't even see what the payoff is supposed to be. Especially since Punk has repeatedly stated that he's not working with the Shield, and his word is good enough for me.