In 1461 Henry Holland has a son let say named, John Holland, with his wife Anne of York. Richard still usurps the Throne 1483. Now we have a Nephew of Richard who has a strong Yorkish claim to throne, who also has a stronger Lancastrian claim then Henry Tudor.
Does he support his usurping uncle Richard III? Does Henry Tudor still make an armed claim to the throne, and if yes would he still succeed with a stronger Lancatrian claimant? Does this put enough doubt that Richard would continue to Reign until natural death? Or is homage given to a John II?