If the DC Court of Appeals adopts this position, then the appeal is over and the case if headed to trial at full speed
https://www.newsweek.com/conservative-lawyers-add-new-wrinkle-donald-trumps-immunity-appeal-1856722
American Oversight, a nonprofit legal watchdog group, filed an amicus brief on Friday that said the D.C. Circuit appeals court lacks the jurisdiction to take up Trump's appeal, and should therefore send the matter back to Chutkan and allow the trial to resume.
"As the American Oversight amicus brief argues, Supreme Court precedent [from 1989] prohibits a criminal defendant from immediately appealing an order denying immunity unless the claimed immunity is based on 'an explicit statutory or constitutional guarantee that trial will not occur,'" the group's official statement explained. "Trump's claims of immunity rests on no such explicit guarantee. Therefore, given that Trump has not been convicted or sentenced, his appeal is premature. The D.C. Circuit lacks appellate jurisdiction and should dismiss the appeal and return the case to district court for trial promptly."....
"Interesting argument in new amicus brief by conservative lawyers that Trump's immunity appeal is subject to final judgment rule and must wait until after trial," former U.S. Attorney Barbara McQuade, who previously served the Eastern District of Michigan from 2010 to 2017 and appointed by former President Barack Obama, wrote. "Brief uses textual reading of Constitution to argue stay should be lifted immediately."