Sega mentions Sonic Rangers in its own press release
Sonic fans soon poked around the trailer's innards on the hunt for clues. Thankfully, Sega itself stepped in with a press release that names the game. "Announcing new console experiences, Sonic Colors: Ultimate and Sonic Rangers, further details on Netflix's Sonic Prime, mobile news, musical events and much more!" reads the press release, sent to Eurogamer last night via email. It seems the mention of Sonic Rangers was a mistake. The press release currently available to view online does not include the Sonic Rangers name: "Announcing new console experiences, Sonic Colors: Ultimate and further...
Source: eurogamer.net