Don't be surprised if tonight's announcement is nothing super notable. Trump does this all the time–he's baiting the media and the deep state into playing all their cards.
The media is throwing a mega temper tantrum and screaming for people to cover their ears, but if the country watches Trump act reasonably and state common sense facts, the media will lose a ton of credibility with the people once again.
This just sets the stage for future announcements from the Oval Office. The media can't maintain the same level of outrage again and again, and the people still stop believing every time they cry wolf about Trump's "lies."