SEGA released a cryptic teaser for a new racing game during its Sonic the Hedgehog panel at SXSW. The short teaser trailer showcases brief glimpses of a car before highlighting a stylized "R" in the word racing. Check out the teaser below: Back in January, a leaked internal presentation suggested Sumo Digital, the developers of Sonic & SEGA All-Stars Racing, were working on a new karting game.