The Demon Resurrections

http://yusaani.com/topics/2016/11/12/373008/
http://yaraon-blog.com/archives/94977



魔
神
の
復
活

This invitation suggests Season 3, or Return of the Lelouch.

My prediction of announcement:
New title set on 2036 a.t.b.
Nunnally gave a birth Lelouch II (ルルーシュ2世, pronounced Lelouch the second) in 2019.

Code Geass Lost Colors 2: Red something
Code Geass Lost Colors 2: Blue something
for the 3DS. Featuring different characters on each version.
Release date: August 10, 2017

Red something featured Clovis x Kaguya couple.

Code Geass Warriors
for the PS4, PSVita and Xbox One.
Release date: Spring 2018

Both are developed by Koei Tecmo Games.
Above first is Ruby Party, second one is Omega Force.