That's a BIG production error.
I think, after this many different photos (thanks Matt) it's probably legit... I mean, imagine how many ARC's we have seen in stores. I'd not be surprised if they have hit the half-way point of their production run (The general mark where the "running change/intentional variation" is made) and now we'll see red ARC's.
The only problem is, will they ship with MORE Anakins and Yodas, or with Waves 2 and 3 of CW figures?
The ARC's are the ONLY CW figure selling out here. Every store has either no ARC troopers, or maybe 5 at most... Then Anakin and Yoda warm pegs. And people say Army builders don't sell well!
Honestly, now I kinda wouldn't mind OTHER ARC variations. Like a green one or something... Then again, nobody knows what the ARC rank structure goes like so who knows if green or other colors even "exist". May be a fun custom product though!