It will premier in October 8
On July 30 it was held a Bushiroad´s Summer 2017 Strategy Presentation where said company revealed various plans for their Trading Card Properties.
On the particular case of Vanguard it was announced that a new Seasong of the anime “Cardfight!! Vanguard G” will come this October under the name “Cardfight!! Vanguard G: Z”. It is still mystery what will be the story or if we will get a new main character or anything.
The Actual Season has the name of “Cardfight!! Vanguard G: NEXT” and it shows the story of Chrono, Tokoha and Shion after the events of the past season and how they get separated and will have to fight each other in order to continue with their individual futures, now at the Under-20 tournament!
Via: Bushiroad (Japanese)