well there could be bugs involving the raven (people not showing up where their supposed to), cutscences firing, political events issues (like maybe you vote yes and for some reason the outcome you see is the vote no one).
I think the differences between MP campaign and Single player one are enough to warrant there will be a few bugs unique to it.
That said I dont care about spoilers cause i know the majority of the first bit of the single player campagin already. its been in the majority of larians media coverage already.
I know the map, I know the wizard is the first guy you meet after that the engineer to give ya the jetpack. I know the majority of the first single player campaign map is mostly elven territory with only undead in the top territory. You only encounter the dwarven provinces in the second part of the campaign after you take the initial campaign area. Your the son of the old emperor and apparently a dragon knight. Your brothers are fighting over the throne in a empire wide civil war and their not dragon knights.
If you choose the undead princess you can give her a dwarven province in exchange for a undead army. She needs it to proceed and research a spell of resurrection for her sexy self.