Leaked images for both this week's White Dwarf, and the Stormcast Eternal Battletome that will be up for pre-orders are out. While it's not in English, you can definitely see the new Prosecutor Hero model coming, along with other new releases.
via Lady Atia on War of Sigmar
vincentdu7178 is credited for the leaks on the War of Sigmar site
This Week's White Dwarf Cover
Stormcast Eternals Battletome
Images again here along with pricing