I expect they will declare Presidents are immune from prosecution for most “official acts as President” but not from everything any President may have done while in office.
The question will then become, in this case, what is Trump claiming was an official act that he is now being prosecuted for.
They may rule on that as well, but in typical fashion will probably kick that back down to the lower court for further debate first.
Exactly, which is precisely the point. Notice the absurd lengths that had to be traversed to concoct criminal cases against Trump. Be it Smith, Bragg, Willis — all had stitch together utterly untested, novel legal theories to charge Trump. None of the activities described in any of the indictments even remotely rises to the level of criminality. Carrying out official duties is not a crime — no matter how hard Democrats try to make them crimes.