I remember hearing about Hyperkin working on a portable SNES even before the FC16Go was released, and up to now had assumed they'd abandoned that project.
The FC16Go is pretty good, with the only obvious weakness being its very meaty design, short battery life and not-as-sharp-as-it-could-be LCD screen. There's certainly room for a competing portable SNES, especially if it address those three weaknesses. Given that Innex and Hyperkin are almost the only names in town when it comes to these kinds of devices, I don't expect any other portables like this coming out outside of the ones that run multiple emulators.