WWE is well aware that their fans are loyal, and because of that, they know that they will buy into everything they tease thinking that it just might happen, no matter how many times they dangle the carrot in front of their faces without actually following through.
Of course, that has been the case with this company since the dawn of time, but it has been happening much more lately than ever before. In recent months, they have been "planting the seeds" for things that won't ever happen, and as a result, it's difficult to take anything they do seriously.
Why they won't deliver on certain matches, angles and other decisions is entirely up to them, but getting fans' hopes up is simply a waste of time. Perhaps officials assume that's what they need to do in order to ensure fans continue to watch, but they're smarter than that. At this point, the tactic has become more an annoyance than anything else.
If you've been patiently waiting for WWE to deliver on any of the following things, thinking that there's a chance they will come to fruition because of how many times they've been teased - snap back into reality. They aren't happening.