As it says on the tin, Alexander III's wife Yolande of Dreux was pregnant, or rumoured to be pregnant when Alexander died in 1286, what happens if Yolande of Dreux gives birth to a son, most likely named Alexander for his father? Naturally there is a regency for the boy, but who sits on that regency council, and what sort of conflicts emerge? Supposedly, Bruce and Comyn were at one another's throats at this point and only Alexander's presence prevented them from fucking over the peace, if this is true, could we see civil war erupt?
What happens to Yolande, does she remain in Scotland? Remarry? If the latter, who too, could Edward I propose himself as a candidate, if his first wife dies, in order to garner some sway with the Scots?