Hell will freeze over first. Trump will not show at inauguration, he has not acknowledged Biden as the next President or that fraud was insignificant in the election.
Anyways, whatever he says, he's got zero credibility, follows the most pathological path of psychopathy, though is expert in massively duping people for his own crimes and frauds. Though, he's so bad and incompetent in everything else, he relies on enablers around him that he later can backstab for his own mistakes.