[Note: The following report explains the discrepancy in the total number of POVs, which GRRM has given as 19. 9 characters are carried over from ASoS and 8 new POVs have been announced so far. It appears that Sansa's chapters count as two POVs.]

Alayne is that missing POV.

...

Parris told us that George wants to write a trilogy about one of the Targaryen Kings.

She did not hesitate to inform him that he needed to finish this series first or might face a riot. So I guess this is a far-future event.