As an advance notice, I haven't 100% decided yet, but after the public release of episode 3 it's possible I may take a break before starting episode 4. I was a lot faster with episode 3 than I thought I would be, but I'm burned out from several periods of working on the game nonstop for hours at a time. And episode 4 will have a lot of eventing and mapping, since that's when the Sea Stars are visited and I want their civilization to be massive.
That being said, I put a lot of effort in episode 3 and I hope people enjoy it when it's ready ^^' I'm currently working on a list of which Gen 7 moves and abilities are in the game (it'll be a notepad file like the marble location list and Pokemon obtainability list) to be ready by public release, and I may also make a TM location list since I'm starting to lose track of where I put them all myself.
Legend Mode will come out some time after the public release, but I'm not sure when yet. SPB currently doesn't have wifi, so Legend Mode discussion will have to continue once she can use the Internet again.