While I don't know the position of this guy within Avalanche Software, he seems to have worked a lot on Disney Infinity and reveals some interesting things on his Tumblr.
Link: http://chadliddell.tumblr.com/post/40743804114/phew-the-disney-infinity-announce-event-is-in
This being the most interesting part of his post, "Play sets are NOT levels. They are full games who’s scale compares favorably with more than a few full price stand alone sand box style games. Think Grand Theft Pirates, (but family friendly of course.) For people who played Toy Story 3 Western Town would be considered a play set if it were in Infinity."
Awesome. The paragraph after this is also interesting as it states that the game was made with families in mind and not children, which means that the game itself will be a little challenging, unlike Skylanders.
His posts are also featured on Avalanche Software's official Tumblr, http://www.tumblr.com/tagged/avalanche%20software, just to confirm that he is legit.