James Finn, Fox's Marketing Communications EVP, confirmed on Twitter last weekend that we will see an extended edition of [X-Men: Days Of Future Past](movie:203942) but...
...not until 2015!
So that means that the October 14th DVD and Blu-ray releases will just be the theatrical cut of the film.
Bryan Singer had previously mentioned that a subplot featuring Rogue (Anna Paquin) was cut from the film due to time issues but will be added to the DVD/Blu-ray releases.
No date has been given for the release of the Extended Editions.
(Source: Dark Horizons)