I'm not sure what you're referencing. Are you talking about the princes in the tower?
They would be the obvious assumption. On that note, assuming that the Usurpation never happened... Edward V would be King, quite possibly married to Anne of Brittany. No Tudor = No Bosworth, though he might come home as Earl of Richmond if the Yorks are feeling particularly generous. OTL's Richard III would probably return to the North, though if George Neville still dies, his power base is still going to be weakened considerably, so he won't be happy about that.
The younger boy will be Duke of York and Norfolk and he needs a new wife after Anne Mowbray dies...