GribbleGrunger on 04 May 2016
Speculation is that he's referring to Gran Turismo Sport as this was posted on GTplanet and Jordan (the guy that runs the site and has tight connections with Polyphony) "liked" the post. Rumor is that its been shown around recently and we've now got confirmation that Polyphony has been inviting GT Academy participants to London for an event that starts on May 18th and runs through the 20th.
The PS5 Exists.
