Possibly, but he hasn't not delivered yet, again unlike Savin.That's a bold statement.
I don't think a single thing Wsan has really hyped over the course of this game has actually been delivered on yet.
We've gotten talk about Evelyn demonification and future plot threads, lots of content for the dryads, corruption for Brienne, continuation of the cursed armor plotline, an equivalent quest for Brint, etc.
I'm actually fairly certain that a good chunk of it won't make it in before everyone moves on to the next game.