Twisted Metal: Head On was recently released for the PlayStation 2 and appears to contain a hidden message revealing that a PlayStation 3 version of the series is currently in development.
Several users from Gamefaq managed to unravel the hidden message located in one of the games unlockable videos. They noted down the letters they saw and then placed them into alphabetical order which revealed the message “Twisted Metal is on PSTHREE”.
Hopefully this turns out to be correct information. I haven't played a Twisted Metal game since the 2nd one on the PSOne which was fantastic. I'll get around to playing the latest carnage soon though!