NuffSaid1996 over at Eurobricks has discovered an eBay listing for an Electro polybag for The Amazing Spider-Man 2 that we haven't seen before. No indication of how to get it or if it's exclusive to any region. If any Brickset members know how to get hold of one of these, let us know in the comments!
Edit: It was pointed out on Eurobricks that this was given out at Kids Fest. It's probably too late for anyone to make it to Kids Fest in Virginia, but looks like the next one is in Indiana next month. The polybag might be available there too.