They have stated since HOI4 and Stellaris that they are going to handle new game announcements differently from now on, though. That is, they will only announce when the game is pretty close to release. That probably leaves less of a window to tease the announcement and less ability to time it around events.
So I'd say there's little point speculating. But when they do make an announcement (and we know that there are unannounced titles in the works) it will be only a short wait for the game.