QuickTidal, on 26 May 2015 - 05:27 PM, said:
Creatively it made sense to us, because we wanted it to happen. They’re two of the best characters of the show. To have them come so close together this season then have them not meet felt incredibly frustrating. Also, we’re on a relatively fast pace. We don’t want to do a 10-year adaptation of the books, we don’t want to do a nine-year adaptation. We’re not going to spend four seasons in Meereen. It’s time for these two to get together. It’s hard to come up with a more eloquent explanation, but this just felt right. [Varys] puts Tyrion’s mission out there [in the season premiere] and the mission ends in Meereen.
I notice they didn't rule out 8 seasons.