Richard II doesn't get deposed in 1399 and lives until 1410, dying of an illness and childless. This leads to a succession crisis and earlier Wars of the Roses.
Richard II in OTL wanted Edward Duke of York to succeed him as king. Richard dies and the Duke of York presses his claim to become king.
Bollingbrooke obviously presses his claim to become king.
The Mortimers press their claim to become king.
In this scenario who would win, I reckon Bollingbrooke because his succession is clearer and he has 4 very capable sons who were also very popular.
Who do you guys think would win?