Directors for the final episodes of Season 8 are David Benioff, D.B. Weiss, David Nutter, and Miguel Sapochnik.
Game of Thrones is notoriously strict about finding ways to keep secrets from leaking, and the hacks from 2017 that saw episodes leaked online early probably mean that security will be even tighter for the final episodes.
Unfortunately, we shouldn’t count on finding out too much about what’s going on with those ice zombies and White Walkers ahead of the 2019 premiere of Season 8.
In fact, the show may be filming multiple endings so that nobody except the people at the top of the HBO chain now the ending before it airs.