The Auto Assembly website has been updated with a video from Michael Bell talking about his appearance at Auto Assembly 2012.
Click the link to visit the site and see the video. Also remember that you can already purchase tickets for Auto Assembly 2013 which has already confirmed three guests, the returning Neil Kaplan (voice of Optimus Prime from Transformers Robots in Disguise), the returning Dan Gilvezan (voice of G1 Bumblebee) and Steve Blum (voice of Transformers Prime Starscream as well as Darkscream, Wars and Fortress Maximus in Transformers Robtos in Disguise, Heatwave in Transformers Rescue Bots along with countless other shows and video games).
Also keep an eye out for Roll Out Roll Call 2013, for an earlier fix of Transformers and GI-Joe goodness