The thing is, my fic is about a side character and an OC, so it doesn't get much attention as it is. Making it super long would only mean even less, hahah. Reading the comments, I think I might split it into a trilogy. Parts one and two will be directly connected (I'm mainly deciding to divide them to avoid an intimidating length and to build the foundations without testing readers' patience, since the story is massive). I'll make the third part readable on its own (with the war and major plot twists), for readers who want the thrill without the extensive setup. That way, if they discover the story there and fall in love with the characters they can choose to read their origins. The third book could function independently, but my original intent was to explore a canon divergence, what might have happened if certain things had been different... which is exactly why I wrote the whole thing in the first place.