Well at only 7 minutes they could be going to talk about Pokemon:Go and Pokemon:Lets go, followed by Sorry we have no information about the next game yet.....
Nah, gen 8 is basically guaranteed to be revealed tomorrow.
- X & Y and Sun & Moon got announced in January/February
- There are 3 pokéballs in the tumbnail of the livestream
- They've uploaded a video for each region every day. Alola should be up in a few hours, so gen 8 would be tomorrow.