Bandai Namco released the first promotion video of the upcoming, collaboration game project the Accel World Vs. Sword Art Online: Millennium Twilight!
This title release in 2017 on PlayStation 4 and Vita first in Japan mixing two famous TV Animes into one game the Sword Art Online and the Accel World.

In the project the two titles going to starts in two different times. The Accel World in 2046 while the Sword Art Online in 2022. Later in the game’s time the two world some way going to connects but Bandai Namco going to release the details later.
Until that, check out above the video!