Some of the Siege toys were on display at the latest Japanese Wonderfest Convention, and these ones appeared to be production figures, as they weren't painted prototypes.... showing us what the colours should be like on the released toys.
We also get to see some packaging examples as well.
And going back to the posting above about the SDCC poster with a hidden message - it looks like there were four posters given out by Hasbro at the event for WFC, and each one looks to have had a different hidden message, as
a second poster has been found and it's hidden message decoded -
Autobots the hour is upon us.
Hopefully the other posters show up (like on ebay), and someone is able to decode the entire message... to see if it does indeed give us info about the new series.