Back in 1993, Atari announced several games, and included in this annoucement
was the game, Tiny Toon Adventures. The game was even advertised and listed
in several magazines, including Gamepro. However, the game would be the
only game from the announcement to not be released.
The game does exist in a beta form and is in the hands of a collector.
If any news about the beta comes forward, it will be listed here, but
I wouldn't expect anything soon.