This is a marker. I believe Q is stating that Trump will tweet this out just before the verdicts of the Military Tribunals are shown to the public via Emergency Broadcasts.

Q posts often pertain to events that might not occur for months or even years into the future. Which is why Q also states that "Future proves past".

Here is an example:

https://qmap.pub/read/3379

I do not believe this particular tweet will be unavailable.Take a look at the stickied post, The Timeline - (https://greatawakening.win/p/GvFnrouP/the-timelime-trump-q-and-the-gre/c/) starting at 32:07 (I suggest watching the whole video if you haven't).