If no one shows up, or if it is completely peaceful, they will spin it as, “Our show of force scared away the cowardly insurrectionists and white supremacists. Trump’s influence is weakening.” Actually, Trump sensed a set-up and urged people NOT to go.
Trump’s team sent out e-mails and texts before the rally in Alabama. Then more for the upcoming rallies in Georgia and Iowa. That is addition to all sorts of texts from GOP candidates. Team Trump did not send out anything about this rally.