Humby said:
-The soccer ball droid. Although somewhat silly, I personally feel it looked and felt like it could have been plucked right out of ANH. And for all we know, it may only have a few moments of screen time.
As seen here: http://i.imgur.com/7tmnPX6.jpg
looks like the little guy is a new sidekick. Probably looks less silly when not moving so fast.