For those interested in buying a Combiners series box, Games Empire is selling them for a good price which "Comes with a Buy a Box Promo for a limited time!"
Not sure what the promo is, maybe the SDCC pack, Omega Supreme or something else entirely?
If no one knows, I will let you all know when it gets here in a day or two.
Store Page
Edit: Sharky mentioned Omega came with a box purchase at Good Games
"Nothing is more stale than old news." - Spike Witwickey
The Omega Supreme card has been packaged with the Feb Loot Crate box as well. Same sized card as Metroplex.
Ahh, good.
The Big W near me doesn't have them.