Gen 8 is called Plus and Minus

It will be announced Feb 2018

The region is called Fornia

The legends are Positori (Data/Grass), the Network Pokemon, and Negatide (Audio/Water), the Soundwave Pokemon

The regional dex has 58 New mons, the rest being only Unova mons

Fornia is located to the west of Unova

There are two new Typings: Data Type and Audio Type.

The evil teams are Team Upload for Plus and Team Download for Minus

The lore behind Positori and Negatide is they were once in love but now resent each other and view themself as perfection

Gyms are back but there are only 5 in Fornia

Pokemon fusions are now a thing, and is called Additive evolution. Only fully evolved, non legendary Fornia mons can do this. The exception is the two box legends since they can Additive.

Additive evo is only temporary and in battle only

Unova is post game