I think, continue the original story with Chloe and Max would be the best choice. I know continue a story from two different endings is a hard thing, and I think a part of this story is written yet, but it's just an idea: go back five years ago, when Max left Chloe, and don't do that. This changes everything in present, and it's a possibility to create a new ending. When you can make another interesting story, but now, plase, make an enjoyable ending to close this whole story line.