>>715039386
It's not a design they're using for a Shantae game. That Shantae pops up at the end of a tech demo for something not related to Shantae, using a heavy sci-fi theme, so it's obvious she was just placed there as a fun 'what if.'
They also revealed a never before seen Shantae design at the very end. What it's for remains to be seen, but at the very least we know there's still more to come.