Hi there!
One thing that’s a must for a high speed camera, is the ability to use Pre-Recording in my opinion!
Do you have any plans to include Pre-Recording with your Spark?
I’d love to help you out with creating marketing material for your camera (or to serve as an extra nice Beta-Tester 
), so if you’re in need of either and would like some high quality slowmo of wildlife (think about stuff like hunting sequences, or classics like kingfishers diving into the water etc), let’s chat! <3