The upcoming Halo TV show doesn't exist in the same canon as the games and books, instead telling a whole new story taking place in what's being called the "Silver Timeline."
In an interview shared to Twitter (via Halopedia), 343 head of transmedia Kiki Wolfkill explains that creating a new timeline allows the TV series and games to be their best.
"We're referring to this as the Halo Silver Timeline as a way of differentiating it from core canon," Wolfkill said. "And both protecting core canon
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