While we here in America will get to finally enjoy Sword Art Online: Lost Song this November, Japan will be getting an entirely new SAO game in 2016. Announced during the Dengeki Bunko festival, Sword Art Online: Hollow Realization will once again take place in Aincrad, the setting of the first arc of the first season, as well as the setting of Hollow Fragment.
From the brief glimpses of gameplay, the environment seems to have gotten a major upgrade. The battles themselves look a lot more fast-paced, though that might already be present in the upcoming Lost Song. While I definitely liked the battle system of Hollow Fragment, it was a bit too complex for its own good.
Since the game just got announced in Japan, it makes sense that there is currently no word on a Western release. However, given that we've already gotten two versions of Hollow Fragment, and are getting the upcoming Lost Song, it seems like it's only a matter of time until Hollow Realization makes its way over here.