I just spotted Universe Voyagers Leo Prime and Overload at my local Target near Chicago, IL. There was one each of them, along with two Infernos. I managed to get a photo of them in the store. As far as I could tell, there haven't been any sightings of them in retail yet.
Very cool! I don't really care about Overload but I really want that Prime! Hope to see them in my area soon!
Spotted them today up here in Washington State, sadly by the time I got there, there were no Infernos. I don't really want the other two of them.