So, must of you don't really read comics and those who do may not even know about this...
You're probably thinking "Clonez lulz" or "Time Travel!" but the real implications are far, far more insidious...
With that one picture, Brian Michael Bendis has offered the possibility that the last 30 years or so of Marvel comics may have occurred without the actual Marvel heroes even being there. To make that clearer, for the past 30 years, the Wolverine in the various Marvel comics has been an imposter Wolverine.
Is that actually what's going on? Maybe. Probably not. That's a pretty ballsy move to make. Color me intrigued though.