Alas, same image we've already seen, but interesting to note that we're getting at least one named character with the release, and confirming that 1 kit builds all 3 variants of mega-gargant. That said, I wonder if there's alternate heads to differentiate the named gargants, or if you just say "yeah this dude is Bundo today".
After Lumineth/Gargants, we're straight into Broken Realms, which I have a suspicion may end in AOS3.0, much like Psychic Awakening led us into 9th Ed. 40k. My local GW manager raised an interesting theory with me, though: everything Slaanesh is keyworded "Chaos Slaanesh", yet the other 3 Chaos gods are keyworded just "Khorne, Nurgle, Tzeentch". Even Clan Pestilens are just "Nurgle" and not "Skaven Nurgle".
So, the theory as presented to me is that we're going to end up with "Order Slaanesh" whenever we get around to Tyrion or Malerion's aelves, representing the last souls dredged up out of the Dark Prince's gullet. It's entirely possible it's Tyrion's aelves, as they were left out of the Lumineth release entirely except for a paragraph describing how they apply themselves to military perfection. Who else applied themselves to military perfection? The Emperor's Children in 40k, who fell to... Slaanesh. It's a leap, sure, but GW does love their circular plot devices.
Alex