Instead of capturing tailed beasts, the Akatsuki appear in Pentos or Volantis. Their goal? To harvest the "magic of the dragonlords" or to "bring peace" by destroying the Iron Throne entirely. Itachi and Kisame vs. the Mountain is a fight scene fans crave.
"A wildling?" one soldier asked, leveling a spear. "Look at those clothes. He’s a mummers' boy."
However, when you blend the shinobi arts with Westerosi politics, you get a narrative cocktail that is addictive, complex, and surprisingly seamless. The Appeal of the Crossover