I put that down to little hype, no confirmation of future release plans and a division forming in the community.
They said the Freddy DLC was coming a week later (3 week gap instead of 2 weeks) because of extra marketing, and a whole week has gone by without any new publicity - just a couple of independant interviews with Boon.
Also, no future releases are set in stone (at least not that we're aware of). There may be a feeling that there is nothing new left to look forward to - we just hope that there will be.
Finally, Freddy himself is now getting comparatively little attention. Some people want him, but some others are talking of other potential guests instead. And all this is pissing off some of the MK-only crowd (including me

).