With Daenerys reaching Westeros and Jon Snow finally back in Winterfell where he belongs, there are going to be some big first meetings and reunions in Game of Thrones season 7.
Game of Thrones season 7 will consist of just seven episodes and is expected to arrive a little later than usual, sometime in summer 2017.
Previous set leaks suggested that when Yara and Theon fight their uncle Euron at sea, one of them will be taken hostage.
This Theon/Jon news could suggest it is Yara who is imprisoned, forcing Theon to be the (presumably reluctant) head of the family.