Incidentally, I have a short hack in mind too. The story begins in 710 A.D. with Robo and Fiona's forest, and ends later. It's an attempt at completely twisting some events while keeping them canonical, so... I'm making it alone to keep the spoilers (sorry about mentioning this "phantom" hack).
I planned to actually begin my hack after Crimson Echoes, but I also see no problem in holding it and participating in this one-chapter hack.