If Sweden won the Battle of Poltava and killed Peter the Great also able to successfully retreat from Russia, how long would Alexei, the less enthusiastic heir of Peter the Great fight on after his fathers death and Ottoman intervention on Sweden's behalf?
What if in 1701, Austria did not accept Prussia's elevation to Kingdom? Would Prussia allign with France, or would they even declare war, or fight in a separate declared war?
Would Denmark-Norway join the Spanish Succession War fully if Sweden did? How long until Russia would westernize and modernize to at least the extent pre GNW?
Since Karl XII is thought to be homosexual, and when asked to marry some women he declined, would he ever have children if he won and survived? Or would he just name a relative of his an heir?