The Doctor Who Experience, which previously featured a specially filmed mini-adventure starring Matt Smith, closed down about a month ago so it could be revamped for the 12th Doctor. The new Experience reopens October 24th, and has restructured the tour to "follow the Doctor on a spectacular, interactive adventure through time and space. Beginning in the Gallifrey Museum and journeying to the heart of the TARDIS, visitors will have to grapple with a threat which could destroy the universe."
This time, the filmed segments are written by Joseph Lidster (Torchwood, Sarah Jane Adventures) and directed by Paul Wilmshurst, who's currently busy directing the 2014 Christmas special. Traditionally, the museum experience has been loosely tied in with the current series story arc. Following Series 5 and 6, the filmed segments involved the Doctor trapped in the Pandorica Mk II, and patrons (who are passengers on the Starship UK) found themselves whisked off in the TARDIS, captured by the new paradigm Daleks, and then pursued by Weeping Angels through a UNIT quarantine zone. During Series 7, The filmed segments were slightly revised to reference Clara instead of Amy and Rory.
This new version might lend support to the idea that bringing back Gallifrey will factor heavily into the back end of this season, however, given that the new Experience opens prior to the airing of the two-part season finale, it may just be that the story ties in with the events that happened on Trenzalor and the Time Lords gift of a new regeneration cycle. If so, and Gallifrey remain "lost," it seems likely that it will continue to stay that way, at least for another couple of years, since they obviously don't like to change the exhibit too often, and I can't imagine Moffat agreeing to something for the Experience that would then require a rewrite based on his own plans for Series 9.