Official Xbox Magazine has posted their MLB 2K12 preview. Not a whole lot of info here, with a few screenshots mixed in.
For instance, batters will round first base after hitting a clean single rather than running through the bag. Gloves have been given detailed stitching and an appropriately leathery texture. And an outfielder who catches a flyout to end an inning will carry the ball in with him or flip it to the fans in the seats instead of throwing it to second base. Best of all, fielders with plenty of time to throw out a runner on an easy grounder will casually flip the ball over to first rather than always rifle it over as if the World Series depended on it.
As for more important improvements? Last year, we cited a lack of hit variety, repetitive play-by-play commentary, and lack of home runs as persistent annoyances in 2K11. Visual Concepts is directly addressing those issues with revamped ball physics (meaning far fewer soft lineouts to infielders) and an additional 80 hours of new audio commentary on top of what’s already there.