As both a NHL '94 and Atari Jaguar enthusiast, I always wondered what happened to the Atari Jaguar port of Brett Hull Hockey. As it was never finished when Jack Tramiel pulled the plug on Atari Corp in early 1996, the only evidence were some screenshots and a short video clip from "The Cave", an infamous Atari Jaguar infomercial aired in late 1995. The game was to have been released in 1994-5.
Many years ago, unreleased and possibly prototype copies started popping up and 1 Atari dealer produced a run of Brett Hull (or "Jaguar League") Hockey. There was also a Jaguar CD version planned, complete with FMV and slow loading times, there's a prototype of it around also.
Apparently, from what I've read, Atari Corp and Ringler Studios, who were contracted to make the Jag port, got into some pretty heated disagreements concerning the game. There was an email dump on the Internet which showed how ugly things got. The game also got some homebrew updates as JHL 13, JHL 15, a team/roster editor and a new update being worked on.
It's not perfect, and it's not NHL '94 level, but it's fun nonetheless. It is pretty difficult, and I feel that a little more time in the oven would have made it better.
Jaguar CD Version (Complete with FMV and long loading times)
Jaguar Cartridge Version