Shadow the Hedgehog could be coming to Sonic Frontiers, according to hints by the developers - Video Games on Sports Illustrated

Sonic the Hedgehog (IDW) (Comic Book) - TV Tropes

Can Archie Sonic beat CC Goku? - Quora

Sonic Frontiers review – wild, weird and a bit broken, Games

Why did the cgi cutscene graphics peak in the mid to late 2000s? 😒 it's supposed to get better not worse a decade later lol : r/SonicTheHedgehog

Sonic Team Wants To Make Another Game Featuring Shadow the Hedgehog

Sonic Frontiers Director Talks About Next Game, Says It Will Be an Even 'Greater Experience

Doctor Eggman, Sonic Wiki Zone

Sonic - Video Games on Sports Illustrated

Doctor Eggman Sonic News Network+BreezeWiki

How Sega killed Sonic the Hedgehog and made a surprisingly sincere game - Los Angeles Times

Why does SEGA have so many mandates for Sonic? - Quora

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Sonic - Video Games on Sports Illustrated

Doctor Eggman, Sonic Wiki Zone