Let's say that while Battle of Tewkesbury is still a total victory for Edward York and his supporters, Few Knights fighting for Henry Lancaster realized that the battle is lost before it's too late, and Lancasterian heir, Edward of Westminster, Prince of Wales is dragged off the battlefield(let's say that against his own will) by his own troops. Let's say that in this timeline Westminster will live long enoough to have a son. How different will be Yorkist restoration with previous king's son still living? How Edward IV will react to news that Lancasterian line is still a factor? What will happen with Henry VI in this scenerio? What with Anne Neville? Any strong candidate for wife nr. 2? How Edward's IV legitimacy will be in this situation? Will Gloucester dare to make a move against his brother's sons in situation, where there's still obvious rival to his rule?