Sword Art Online was a breakout success for it’s creator but the man behind SAO also produced another series, Accel World. This reportedly takes place in the far future after the events of the entire Sword Art Online series. So, it is only fitting that these two IP clash in a special cross-over adventure!
Bandai Namco has announced Accel World VS Sword Art Online: Millennium Twilight for PS Vita and PS4. Accel World VS Sword Art Online: Millennium Twilight is a collaboration of two Reki Kawahara light novel series and will be released for the PS Vita and PS4 in Japan in 2017.
It is very nice that the SAO series of games still has a home on the PS Vita platform and that Bandai-Namco Games still wants to support the PS Vita in 2017. Expect more coverage on this title once further information releases.
Sources: I Play PS Vita VIA Siliconera