After dominating the pop culture zeitgeist for the better part of a decade, Game of Thrones fell from grace after a shockingly lackluster final season. Since the series was based on George R.R. Martin's ongoing and critically acclaimed A Song of Ice and Fire novels, fans pondered where everything went wrong. They also wondered if there was some way to redeem the HBO show. One of the most popular fan solutions was to reimagine David Benioff's and D.B. Weiss' adaptation as a series of interconnected movies.
Source:https://www.cbr.com/game-of-thrones-worked-as-movie-series/