I'd query exactly what you're laying out first. There's often a danger when we build a world or plot that we think the reader needs to know the world and all the background at the start, where that's rarely the case. In fact, I find 80 percent of what I know has no place, certainly in book one. So, my question is what sort of information are you putting in before the plot point? If it includes things like kingdoms, laws, ancient prophecies, background history of the characters, the lay out of the world, customs, etc etc I think I'd strip it to the bare minimum and get to the plot point, especially if it's one involving conflict.
Hook us first and then we'll read on and enjoy the world, but without a hook it becomes a little boring. Imho.
Just saw your post above - the love triangle is the conflict, right? It doesn't need built in advance, it can start with the impact and then build the history as you write.
The dead granny might be a nice start, though. Sorry Gran.
And it's probably a good idea to know what genre you're writing in soonish as epic requires different stuff than eg urban, by and large.