So this Kickstarter project (https://www.kickstarter.com/projects/silverfallsmini/breath-of-thunder-a-jrpg-on-modern-and-legacy-consoles) initially promised a release for several retro consoles for the new crowdsourced game "Breath of Thunder" if certain stretch goals for the kickstarter were fulfilled, including a release for among other platforms the Atari Jaguar, Sega Dreamcast and Game Boy Color, but the creator has since quietly withdrawn that promise and now only focuses on Nintendo Switch, PlayStation Vita, and Atari VCS. Although he still wants to eventually release the game for all consoles that were initially mentioned in the kickstarter, he now considers a release for those platforms a bonus if they ever materialise and shouldn't be considered guaranteed.
However, he did release a video on YouTube of him having made a very rudimentary ROM for the Atari Jaguar, but it's basically nothing more than a still image:
My take on this is, that because the creator behind it is known for wanting to tinker with different platforms, we'll probably see demo versions, or proof of concepts rather, on many platforms like the Jaguar but the full version of the game only on Nintendo Switch.
Still, a neat little project.