Takashi Iizuka, vice president of product development for Sega's Sonic the Hedgehog series, has confirmed the possibility that Sega may introduce characters from IDW's Sonic the Hedgehog comic series in future video game adventures. Many unique characters have joined the Sonic video game franchise over the years, including lesser-known characters like Big the Cat, who first appeared in the 1998 Dreamcast game Sonic Adventure, Ray the Flying Squirrel, who debuted in SegaSonic the Hedgehog, and Mighty the Armadillo, who also made his first appearance in SegaSonic and later returned for the 32X game Knuckles' Chaotix.