Sorry if these questions have been asked before; I kinda skimmed the thread.
No problem, some things have changed since we last talked about them, anyway, and probably should be answered again.
2. Who's the initial lineup?
3. Any love for the characters who don't get fighters? Will any of them be in?
5. Will you expand the cast over time via patches, etc?, or is this a one-off sort of thing of "you get who you get"?
6. What stages are you anticipating? Will you be adding stages over time?
After evaluating how much time it takes to develop this game, we've decided to switch to a rolling release model. The v1.0.0 release, planned before March 2016, unfortunately, doesn't have much: Marisa, Reimu are the only characters, and the Hakurei Shrine and the Forest of Magic are the only stages. HOWEVER, the goal is to then iterate and incrementally add new characters, stages, and features over time. Most of the time we've spent so far has not been on the characters and stages in themselves, but rather building the engine the game runs on. From what I see right now, by the time v1.0.0 is rolled out, the pipeline for adding new content will be very streamlined.
Following Marisa and Reimu, we have Wriggle, Youmu, and Sakuya planned, but all of them (save for Wriggle) hasn't been touched since Marisa and Reimu are our priority tasks right now. There were talks of a Makai and SDM stage, but nothing definitive yet.
4. Any danmaku elements, or is this purely a Smasher?
Is this even a question? What is Touhou without danmaku?
I'm REALLY sorry that this is taking so long. The fact is that none of us are getting paid to make this, and all of us have our own IRL work to deal with. Progress is slow.
Right now, I'm just trying to get us back into a stable build (a lot of stuff broke recently). Once we're there, would you guys want to see some more regularly released test builds? I tell you all now, none of what we currently looks remotely like a full Smash game yet.