I just discovered a disturbing rumor about Season 7 of Game of Thrones and it involves House Tarly, who is a vassal of House Tyrell of the Reach. Based on leaked photos and social media, it looks like House Tarly is going to betray House Tyrell in favor of the Lannisters. Part of me is not surprised by this supposed betrayal. When Cersei Lannister blew up the Great Sept of Baelor, she wiped out House Tyrell’s line of succession with the exception of Olenna Tyrell.
Because Randyll Tarly only admires strength and looks down on women he might think that House Tyrell is no longer strong enough to rule the Reach and won’t acknowledge a woman like Glenna Tyrell or Daenerys Targaryen as his master. My guess is that Randyll Tarly will take advantage of the chaos of the Great Sept’s destruction by offering his allegiance to House Lannister in exchange for becoming the new rulers of Highgarden. This kind of mirrors how the Lannisters replaced the Starks and Tullys with the Boltons and Freys as rulers of the North and Riverlands after the Red Wedding.
There has even been reports that Jaime Lannister, Bronn, and Randyll Tarly will lead a Lannister-Tarly army against Highgarden and conquer it, which would make House Tyrell officially extinct. This will be a devastating setback for Daenerys Targaryen because the reach is now the wealthiest, most populous, and most fertile region in Westeros. If House Tarly joins the Lannisters (with a brilliant military commander like Randyll Tarly leading it) and wipes out House Tyrell, then Daenerys’s hold on the Reach will be severely weakened and she would have to fight for every inch of land she can get. Some Houses of the Reach might side with Daenerys, some might side with House Tarly and the Lannisters, and some might remain neutral. It is going to be a complete mess.
On the upside, it has been rumored that after sacking Highgarden and heading back to King’s Landing, the Lannister-Tarly army will be ambushed by Daenerys’s Dothraki horde (which is well over 100,000 strong). It really would not matter how Jaime and his allies will deal with this ambush because the Dothraki would outnumber them and if Daenerys’s dragons show up their annihilation will be guaranteed. Also, Robert Baratheon once said that only a fool would fight the Dothraki in the open. So even though she might lose her Tyrells allies and lose some control over the Reach, Daenerys just might salvage the situation with this victory. Overall, I look forward to seeing how this will unfold.