Yeah there's not really anything to it other than a one-off line in one episode, it's not like the Face was all "I am Jaaaaaaaaaack Haaaaaaaaaaarknessssssss".
Not that I think it'll happen, or don't think he's the Face. Just it's not solidly concrete in the canon (which is pointless, because of timey wimey stuff).
<span style="font-size: 11px; color: #959595;"><a href="/forums/profile/105">Areas</a> said:</span>
Only one episode left of Entourage. I have no idea how they plan on resolving everything in a 25 min episode. >.>