I definitely got a heel vibe from Sheamus last night. He wasn't displaying any heel mannerisms or antagonizing the crowd or anything, but he was certainly jeered for winning the strap, and the original plans earlier in the year called for Sheamus turning heel, let's not forget. With Ambrose no doubt wanting another shot and with he and his fellow Shield comrades feuding with Hunter (Sheamus' real-life buddy) at the moment, that creates the perfect scenario for Sheamus to go heel by becoming Triple H's aide and/or the "unofficial" fourth member of Evolution (or just the guy filling in for Batista when he ends up taking time off) and wrestling Ambrose in a rematch at Payback.
I'm not down with bringing back the European Championship. I like the logic but it's such a dead and forgotten title to the majority of the fan base that I'd rather it just stayed that way. I do, however, like Sheamus turning smug and saying how sad it is that an Irishman like himself has to bring back some class and nobility to the United States championship that no American could (in this scenario, he wouldn't be associating with Hunter at all, just going heel on his own.)
RVD was the man who unified his Intercontinental Title with the European Title and vanquished the latter into oblivion back in the day, so in the hypothetical scenario that Sheamus DID resurrect the European Championship, a feud with RVD would be excellent both for the ring work and for the historical significance. Sheamus could even put RVD on the shelf (as he did HHH four years ago) if the feud were to happen right when RVD is ready to leave again.