As we mentioned yesterday, WayForward's Matt Bozon was involved in a Reddit AMA today. We dug through the questions and found a few tantalizing tidbits that fans should appreciate.
On a Shantae game that dives deeper into lore and provides more challenge
I'd love to get back into that, and have been exploring those story lines recently. I tried to keep Sirens a little on the light side difficulty wise, since we are dealing with a wider audience than usual, and throwing a lot of new ideas at them. But, I also miss the "classic" difficulty.
On the chances of a Shantae 3D platformer
Sure, we've talked about doing that a lot since the N64 days. There's nothing stopping this from happening (well, other than lots of time and money). So it's a possibility.
Bonus features for the first Shantae game on Switch
There is a front-end, it doesn't just boot directly into the game. You'll be able to pick whether or not you want to play with the GBA enhancements, and we're working on getting some bonus stuff in there too.