I am not allowed to state how I know this but I have been informed that the sequels to "Poltergeist" are getting the special edition treatment however they will not be released until sometime in 2014.
For those of you who don't know there is plenty of Material that has never been released on home video on all the "Poltergeist" Films. The originally shot material by Tobe Hooper on the first film to the many deleted scenes that were found in the "Poltergeist II" screenplay but never made it to the final cut of the film. There is also all the materiel from the third film that has many fans of series want to see including the original ending.
"Poltergeist III: underwent re-shoots after the star Heather O'Rourke died. Even though the film had wrapped months prior to her death for some reason the studio ordered re-shoots and what the original is like is anybody's guess after 25 years it would be nice to finally see what the original ending was... Maybe Now we will know