Although Game of Thrones overtook George R.R. Martin's books long before it ended, the Jon Snow sequel show could still use one A Song of Ice and Fire character the HBO series didn't use. A Jon Snow sequel is reportedly in development at HBO, which would see Kit Harington reprise the role. It's a surprising move, given Game of Thrones' ending wrapped-up Jon Snow's story rather neatly, and the focus on spinoffs has been prequels set long before the timeline of Jon, Daenerys Targaryen, et al. Despite that, however, there are some intriguing directions it could go in.
Game of Thrones mostly passed Martin's books in season 6 (though even before that it was making increased changes and cuts), which inevitably included alterations to Jon Snow's story. The biggest element — Jon Snow's death at the hands of mutinous Night's Watch brothers — was kept intact (albeit again with some diversions), but otherwise there were broader changes to that plot. That included cutting many aspects of the Wildlings themselves and their part in the story, with one twist seeing Mance Rayder survive, his body switched with that of Rattleshirt who dies in his place, and infiltrating Winterfell, missing completely.
Related: 5 Key Game Of Thrones Issues The Jon Snow Sequel Must Fix
Another story and character Game of Thrones cut from the books was Val, a Wildling «princess» — the sister of Mance's wife, who also didn't make it to the adaptation — who becomes a key figure in Jon's arc. So far, it's unclear exactly where Val will end up, which made it easier for Game of Thrones to cut her; the show's version of Jon did work, but would've been even stronger with Val there. She represents a temptation to him that he must resist, an opportunity to have the
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