My sister just pointed me to this update on Sly 4 from this year's E3!
( Videos under the cut.... )Basically, the story will kick off with Bentley noticing that pages of Sly's family book (The Thevius Racoonis) are disappearing right before his eyes. This prompts Bentley to bring the gang out of retirement so they can hop on his new time machine and find out what's going on.
The story sounds cool and the gameplay looks great. But I'm a little worried about the fact that Sucker Punch isn't developing Sly 4. The guy in the interview seems to sincerely love the franchise; so I'll keep an open mind until the game comes out.