The Index fans are pissed that is isn't a new anime season, and both sides are confused by this specific crossover. Yep.
That being said, there's already a light novel crossover between these two that is basically "the Index characters play Virtual-On, shit gets literally real", and it's apparently pretty good, so a straight adaptation that's just Virtual-On with visual novel sequences could turn out pretty good.
This post has been edited by Candescence: 12 March 2017 - 06:14 AM
Details from Gematsu, also turns out the title should read as A Certain Magical Virtual-On:
Sega has announced a A Certain Magical Virtual-On for PlayStation 4 and PS Vita, a crossover between Dengeki Bunko's A Certain Magical Index light novel series and Sega's Cyber Troopers Virtual-On action game series stemming from a crossover light novel published in May 2016. It is a high-speed battle action game with online support due out in Japan in 2018.
A Certain Magical Virtual-On is set in the world of A Certain Magical Index, in which Cyber Troopers Virtual-On appears as a “sport.” Stemming from the people piloting Virtuaroids mechas and participating in this sport was a sudden development leading to a world crisis that will eventually be made clear. The game is being written by A Certain Magical Index author Kazuma Kamachi, and Virtual-On series character designer Hajime Katoki is in charge of illustrations.
The world that appears in A Certain Magical Index will carry over to the game. Starting with the protagonist Toma Kamijo, various characters including Index, Accelerator, and Mikoto Misaka will pilot Virtuaroids, and fierce battles will unfold in the Academy City setting.
The high-speed battle action that has become a staple of the Virtual-On series will be present, and Sega promises to make maximum use of the experience it gained in developing the series. The special abilities possessed by the characters of the A Certain Magical Index series will be amplified by piloting a Virtuaroid—fired as an attack from the mecha—and used as a new battle method. It is said to be “one of this game's biggest appeals.”
This crossover is baffling, but on the other hand, maybe VO will be fast and fun again after Force and Marz. I'm also hoping that matches are generally 1v1.
Assuming it still looks nice once we see gameplay footage, I'll probably end up importing the Vita version. At least I'm okay with VOOT-style pad controls.