I know; sorry to dash your hopes. It's *always* possible it's President Trump as the special guest, but I have a feeling (my opinion only-no basis for thinking it) it could possibly be Pence, one of the Trump children, or Giuliani (since it's in NY). Maybe even Giuliani's son, since there's talk he's wanting to run for Mayor of NY? He's going to need those people behind him, if that's the case.
Or maybe even the McCloskeys or Nicholas Sandmann. Or an up-and-comer like Kim Klacik in Baltimore.