A Polish site accidently revealed the news, however since then Sports Interactive has asked the site to pull down the info.
Some of the new features we might be seeing in FM 2011:
* Improved training options
* Improved and more advanced searching for players
* Improved graphics and 3D view of the match
* Introduction of football agents
* Introduction of night/day effect in matches
* Introduction of additional weather conditions
Sports Interactive should make an official announcement in the upcoming weeks, so until then this piece of news should be handled as a rumor...
However, the box art of FM 2011 that we found seems quite legitimate and might as well be the following: