Ok, this got me thinking. Let's say that Anne Neville is a bit luckier and has three children with Richard III:
1- Edward Plantagenet, Prince of Wales (b.1473: d.1484)
2- Cecily Plantagenet, Princess of England (b.1478)
3- Anne Plantagenet, Princess of England (b.1483)
Well, what would be their fates? At Richard III's failure at Bosworth, they would be his heirs and at the same time threats to Henry VII, I can imagine that they would be married off to supporters, but whom? My idea is that the best bet could be:
1- Cecily Plantagenet m. Richard Grey, 3rd Earl of Kent
2- Anne Plantagenet m. Thomas Stanley, 2nd Earl of Derby
This leads to what parts they would play when it came down to the Tudor dynasty. My best bet is that they are treated in a similar fashion to the daughter of George Planatagenet, Duke of Clarence. They will be deprived of their inheritance and treated as normal, lower born nobility. I can see later into Henry VIII's reign that they may be tried for treason, much like the truly unfortunate Margaret Pole.
P.S- Mind if I use this idea for a mini-timeline thing?