It seems Trump will be speaking in a bit less than 90 minutes (I think 3:15 PM Eastern Time? Not sure, I may have messed up the timezones )
Let me make a guess: I'm predicting that his rhetoric will *not* be conciliatory, in fact he'll revert from the relatively more mature tone he had for that ONE speech where he said he'll prepare for transition. He'll instead argue that the push for impeachment and the move to ban him from Tweet, justify his behaviour, prove that the radical left are evil and they must be stopped at all costs.
I do NOT expect he'll declare martial law (mainly because I expect he knows he'd be thoroughly disobeyed), but I expect he will repeat that the election was stolen, that he will never concede, and that the fight goes on.
He'll be hoping (obviously without saying it) that a terrorism campaign in the next 4 years will propel him back to the presidency, and that he'll intimidate congressmen from voting for his impeachment because they'll be fearing for their lives.
Let us see whether I'll get this right.