We know he's a playable character, yet he's not locked in the havoc pack armor sets and the only other dlc we know of is the dinobots/insecticon pack not available yet. So is anyone else wondering how he's unlocked or if perhaps he'll be released with another dlc pack?
http://www.tfw2005.com/boards/transformers-news-rumors/646530-upcoming-fall-cybertron-dlc.html Look at the picture of the third pack. Looks like he's there.