What if by the time Richard the Lionheart died in 1199, Richard the Lionheart is further down the line in the succession
Here are the heirs of Richard in this TL
Richard the Lionheart m. Berengaria of Navarre
-William of England, Duke of Aquitaine b. 1195
-Berengaria of England b. 1192
Geoffrey of Brittany m. Constance of Brittany
-Arthur, Duke of Brittany
-Eleanor of Brittany, Queen of Aragon b. 1184
-Matilda of Brittany, Duchess of Austria b. 1185
How would John Lackland react in this situation?