WI: She had died shortly after giving birth to her third daughter, Cecily. What would be the remarriage possibilities for Edward now?
Well in this case EW died around the end of March, 1469 so there are:
Anne Neville (11 June 1456) the daughter of Richard Neville, 16th Earl of Warwick, although she has just lost her previous husband, who was Henry VI's son, Edward.
Marie of Brittany (1444–1506) was the younger daughter of Francis I, Duke of Brittany, by Isabella, daughter of King James I of Scotland.
Catherine of Luxembourg-Saint-Pol, daughter of Peter of Luxembourg, lost her husband Arthur III duke of Brittany in 1458.
Also Elizabeth Lucy who was Edward's long-standing mistress, and although there are rumoured to be over five children of theirs, most historians just stick to the two that are known for sure, being, Elizabeth Plantagenet (1464) and Arthur Plantagenet, 1st Viscount Lisle.