The official Sonic Twitter announced today that Sonic Team Racing will in fact be delayed until May 21st, 2019.
Hey guys! To make Team Sonic Racing the best game it can be, we’re giving the team extra time to work on it. Our new release date is May 21, 2019.
We know delays are no fun, but quality matters most. Thanks for your patience – we’ve got more to show you for TSR very soon!
— Sonic the Hedgehog (@sonic_hedgehog) October 25, 2018
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