Yeah but I'm pretty sure that he'll still be in Essos and have to deal with Daenerys (the episode preview picture shows her). I don't think they get him to Westeros in one episode. Maybe if they do a time skip similar to the one at the end of TWDS2.
They only way they get Asher to Westeros is if they do a MAJOR time skip. Mereen is fucking FAR from Westeros and the North in particular. And, right now they've just killed Jofferey. So, if he made it back to Westeros it'd be have to be well into S5/Book 5 probably when
Stannis marches on Winterfell.