I don't think they say WHO is making the Jan, 8th announcement.
Junichi Matsuda and one of his game developers are going to be on Pokemon Smash the Sunday before and the Jan 8th thing aired as a commercial. Its going to be on a Tuesday with nothing Pokemon related being with it (so I was told in another thread).
So honestly, I'm thinking its an extended preview of the first episode for N and Team Plasma's first episode or something to do with the movie. I don't think there is anything game related to it right now.