[Book Spoilers] Stone men on the show?

[R'holling Stone]

There have been multiple mentions of greyscale and/or the stonemen so far this season (during shireens convo with sam and gilly, in volantis when tyrion is listneing to the red priestess, and stannis during his "dad of the year" speech). It also seems like the show has retconned the home of the stonemen to be the ruins of Valyria, not Chroyane like the books. This makes it likely that even though we almost definitely wont have the griff crew this season, we will probably have some characters (likely tyrion and jorah) visit the ruins of valyria and encounter the stonemen this season. This would obviously be a big moment for the show. Thoughts on the likelihood of this and the possible impact it could have?