Looks like Ford is paying attention to the crowd and the guys across the street.
According to Jalopnik the old 4.0L V6 will be replaced with a healthy 3.7L V6 featuring 315HPs, the GT will be available with the Coyote 5.0L V8 400HP.
Here's the summary of all the things to come:
3.7L V6 to be rated at 315 horsepower: Same as 2010 GT; 15 hp more than Camaro V6
No immediate plans for EcoBoost V6 Mustang due to small horsepower gap between EcoBoost and 5.0L V8 (365 vs 400)
2011 Mustang GT to be rated at 400 horsepower, will get increase in 2012
2011 Mustang GT to get 6-speed transmission and variable valve timing
2011 Mustang GT Track Pack to include Brembo brakes
2011 Mustang GT 5.0L V8, 6-speed, track pack, Brembo brakes ran even with 414-hp BMW M3, which is 200 lbs lighter, at GingerMan Raceway in South Haven, Michigan
2011 Shelby GT500 to get Aluminum Block
Next special edition: 2012 Boss
Looks good...
Source:
http://jalopnik.com/5351785/2011-ford-mustang-gets-315-hp-v6-50+liter-coyote-v8-six+speed-gearbox