Assuming that Arthur died from sweatin sickness, WI in the same year he died (1502) an epidemy had hit his younger brother Henry and killed him too? Now Henry VII has only daughters, the eldest of them recenly betrothed to James IV of Scotland. Would this marriage still happens, or would Henry VII find other husband to Margaret in order to avoid the Anglo-Scotish union? And assuming that Elizabeth of York still dies after giving birth almost one year later, would the old king find a new wife in order to have a male heir?