WWE spent more time at Survivor Series hyping The Rock, a guy who didn't even appear (not even VIA SATTELITE), more than anyone else on their entire roster.

As Aky pointed out, it would have been nice to at least get some kind of reaction or snark comment from Reigns, something to even slightly hint to an eventual program between him and Rocky. But all we got was an incredibly lame segment of Reigns looking bored in Vince's office while Vince mumbled about how great The Rock was.
Rock/Reigns is clearly the biggest match WWE can do at this point. Even though The Rock hasn't made a WWE appearance in over 2 years... Even though we have no idea when he will show up again and it likely won't be anytime soon... Even though WWE has done nothing to build the match or even hint at it...
Yet people keep talking about it and are excited about it, because The Rock is the ONLY interesting opponent left for Roman Reigns at this point. Roman's title reign has lasted over a year, he's beaten just about everybody. The issue is that WWE haven't built anyone else as THE guy to dethrone him except Brock Lesnar, and he already got smashed too. More and more fans are starting to get bored with the reign and ready for Roman to drop the belt, and with Wrestlemania season approaching there's naturally been more and more discussion about the Rock match, because it's the finish that makes the most sense as a long-term storyline. Too bad WWE's booking is centered around money and "moments", not long-term builds.
But The Rock shouldn't be the guy who ends the Roman reign anyway, and if Roman beats The Rock then his reign just continues and they STILL have to build a full-time guy up to take the belt off him. So I'm fine with waiting a year or two to do Rock vs Roman, because it doesn't need to involve the title.