The official Sonic Twitter announced today that Sonic Team Racing will in fact be delayed until May 21st, 2019.

This shouldn't be too terribly surprising as we've not heard anything in regards to the game for over a month along with the recent Russian article depicting it releasing next year. A solid date is nice though. Time will tell if this also affects the comic tie in but as of right now, it's still set to release Dec 19, 2018