Yea I know Legacy... he's kinda odd, he doesn't attend the event (I think he attended Employee Preview in 2011 though), but he has worked 2003 (Screamhouse Revisited ....exact duplicate as the previous year) & 2010 (Catacombs). But yea, he knows a few people that tend to be correct on what the line up for the event will be for Orlando for the most part, so I'd say that is a very likely list of IPs...
Army of Darkness - Fun Fact: we were supposed to have this as a SZ in Hollywood Blvd in 2009, however there was an issue with the rights so it fell through. So we got "Lights! Camera! Hacktion!" (a fake movie being made) instead. The Director of that "movie" was named "Mas Imiar" (which is Sam Raimi backwards). Now we did have the AOD "Pit Scene" in Silver Screams (but like the previous 2 Die-In houses it was under a fake movie name) called "Midevil Dead". So if anything, I would take the AOD rumor to be more along the lines of "Ash vs Evil Dead" since that is newer (and does tie into the recent Evil Dead sequel).
Trick R Treat - I know A&D LOVE this movie. We actually had it as a (loosely based) SZ in 2008 called "The Skoolhouse", which is also the same year that Central Park got its jack-o-lanterns in the trees (miss that so much, glad they brought it back even if im not there). With the impending sequel on the way, it would not surprise me if it was a house next year, but we'll see.
FTWD & Purge 3 are to be expected... but hopefully Terror Tram is amazeballs this year and they keep Purge 3 restricted to Terror Tram ONLY. I wish FTWD could be limited to SZ only, for the metro sets. I still have yet to watch the first 2 episodes (got them on the DVR though), but it does seem to 'look' way better than TWD (which I find incredibly boring), so we'll see.