I intended to end my book but instead I’ve developed a new character with DEEP lore
I meant to end my book now, the main characters story was supposed to come to a close. It was supposed to end with this new character saving a main character and be done (I know that doesn’t really sound like a place you’d end it, I don’t feel like spending an hour explaining the entire reason we’re here) but now I’ve brought this character in and I needed a reason for the main character to really bond with her and I found that reason: fighting. From there it kind of just spiraled into his big lore tunnel and I don’t know how to get out. I don’t know where to go from here and I keep going back to my planning board as if some new idea will suddenly be written down there. The problem is, this wasn’t a planned part of the story. Do I just let it keep flowing and see where the hell this goes or remove the bridge and end the book?