Splinter Cell: Conviction is a stealth / action game developed by Ubisoft Montreal, released in April, 2010 for the Xbox 360 and PC. The project was originally announced on May, 2007 when Ubisoft released a trailer for the game. It depicted a more rugged-looking Sam with long hair and a fully-grown beard. He had the ability to blend in with the environment, interact with tables and chairs and engage in hand-to-hand combat with enemies.
The game was due for release in November, 2007. However, it missed its initial launch date and on May, 2008 Xbox World 360 magazine reported that Splinter Cell: Conviction was “officially on hold” and that the game had been taken “back to the drawing board.” While Ubisoft never confirmed this, they announced that the game had been pushed back to the 2009-10 fiscal year.
The game resurfaced at E3 2009 with a completely new visual style and a more casual-looking Sam. The developers confirmed that the “new” Conviction had been in development since early 2008, commenting that “the gameplay has evolved a lot” and “the visual direction is simply much better.” [Info from Wikipedia]
We can say that the original Splinter Cell Conviction was cancelled, as the final game and gameplay look very different from what was shown in 2007.
Thanks to Userdante for the contribution! Thanks to Jason for the english corrections!