At the end of the "New Work Announcement" panel at the "Dengeki Game Festival 2017 & Dengeki Bunko Spring Festival 2017 & Dengeki Comic Festival 2017" event on Sunday, light novel editor and anime producer Kazuma Miki asked fans to "please wait a little longer for season 3!" Miki did not specify which franchise his statement was referencing, but he said it after announcing the Toaru Majutsu no Virtual-On fighting game.

As the title indicates, the game is a collaboration between Kazuma Kamachi's A Certain Magical Index fantasy light novel series and Sega's Virtual-On robot-fighting video games. Kamachi had written a Toaru Majutsu no Index x Dennō Senki Virtual-On: Toaru Majutsu no Virtual-On (A Certain Magical Index x Cyber Troopers Virtual-On: A Certain Magical Virtual-On) crossover novel (pictured at right) last year.

Miki wrote on his Twitter account last April, "Please understand that this is an unofficial statement. I am always receiving everyone's passionate opinions on this. Index anime [season 3] is plausible, so please wait!!"

A Certain Magical Index light novel series has inspired two television anime series, a 2013 anime film, and multiple manga adaptations. A Certain Scientific Railgun spinoff manga has also inspired two TV anime adaptations and an original video anime (OVA) project.