Here it shows a new head (with comm headset) and possibly new lower arms as she's wearing gloves.
Yeah the Leia with the White Vader from ROTJ Infinities has a new head and possibly new arms, definitely new hands. We were talking about the Leia that comes the Marvel Comic pack as shown below...
Taking a look at it, I was wrong about the legs, there's nothing new about them. It appears Leia got a new head (or at least the paint job makes it look unique) and a holster, the rest is pure POTF2 Hoth Leia poop.
Then again perhaps its just a mockup and Hasbro will surprise us. It would be in their best interest to make a new figure, because then they could just re-release it on a basic card as a Hoth Leia.