Spoiler warning! Don’t read ahead until you’re fully caught up with Game of Thrones.
The moment the Game of Thrones theme song, composed by Ramin Djawadi, starts playing, viewers expect to see the title sequence animation, a 3D map of Westeros and Essos. The realms unfold, and normally viewers are able to see the fictional world like a map — never from the inside, though. And we were used to the intro slightly shifting every single episode.
In the seasons prior to Season 8, we saw some of the house sigils change, depending on which family was conquered and by whom . The hardest one to take was when the Boltons had overpowered Winterfell — in the title sequence in Season 6, viewers could see the Bolton house sigil, along with an upside down flayed man. When Jon Snow defeated Ramsay Bolton and took back Winterfell, the following episode’s intro shows the Stark sigil back in its proper place.
Source : https://www.distractify.com/p/title-sequence-game-of-thrones-season-8-changed