It really is amazing how often this needs to be said.
All minis made by GW are initially cast in resin so they can be painted for the rule books and box art.
The rumour picture is clearly resin, bur that does not mean the final mini will be.
Anyway, looking forward to finding out what next week's preorder will be. Hoping for skirmish or shadow Aelves. We should get the details on Monday.