Nah, its open source. If I had the money I would buy one for Tempest 2000, Rayman, and maybe AVP
Its a shame it never took off and sunk Atari. Would have been cool to see Atari stay in the game for the sixth gen. Atari had the rights to Gauntlet. Seeing Gauntlet Legends with a proper sequel in addition to an expansion pack would be a sight to behold.
Not that I am an Atari fan though. I have a hard time getting into NES games... Atari would be ancient for me. Heck even SNES/Genesis games kick my ass although I have admiration for their art.