It wasn't Brock Lesnar returning, it wasn't Jericho (Although both of those were amazing), and it certainly wasn't Tensai showing off his moves. It was the fact that the WWE let the shield physically beat with ease their top three baby faces. John Cena, Sheamus, and Ryback, all of whom didn't stand a chance. This is something that the Nexus should have done to make their strength known. HHH is looking at the future, I haven't been more excited for WWE in years. They're finally starting to use that young talent they have. With the nexus, the major baby face Cena buried them, which is exactly what I thought the shield would become.
This also opens up a 6 man elimination chamber tag team match, with Ryback, Sheamus, and Cena (Or probably Orton since Cena might be apart of something else). Very excited for the future of WWE and this new era we're seeing.