there already is/was a cfl video game made my wintervalley (????)
http://www.wintervalley.com/cfl_99/
I actually downloaded the demo once it was kind of like the old madden, very very old like the first 3 or 4 seasons worth but not a bad first attempt I guess if they could get a reputable company on board to make the game I would definately buy it
screenshots
http://www.wintervalley.com/cfl_99/screenshots.htm
this is kinda the same thing just udpated same company any everything
http://www.maximum-football.com/