Classic Sega games are coming to the PlayStation Network, if leaked ESRB ratings are to be believed. Streets of Rage 2, Golden Axe and Sonic the Hedgehog 2 can all be seen with new ratings from the board. These games are already available as re-released on Xbox LIVE Arcade, so it makes sense that the PlayStation Network should get them as well.
Fans of Sega compilations may also want to look into the upcoming Sonic's Ultimate Genesis Collection, which houses a number of classic 16-bit games.