Two new PlayStation 3 ESRB ratings for Grand Theft Auto: Vice City (technically a re-rating) and Grand Theft Auto: San Andreas suggest that the two Rockstar Games hits are heading to Sony's console as PS2 Classics releases (via PlayStation Lifestyle). Grand Theft Auto 3 came to the PlayStation Store in September 2012, so it stands to reason that the other two last-gen games will follow it.
We learned only last week that Grand Theft Auto: Vice City will soon be coming to iOS and Android devices in celebration of the game's 10th anniversary. A simultaneous PS2 Classics release on PSN would be pretty nifty, though here's hoping we won't have to wait until 2014 for the 10th anniversary release of San Andreas.
None of this is confirmed, of course, but an ESRB rating is generally a safe bet that a release is incoming.