It appears that some more classic titles, that people such as myself desperately want sequels for, will be heading to the PlayStation 4 as PlayStation 2 classics. Earlier today it was found that the PEGI ratings board had rated Ape Escape 2, Dark Cloud 2 (also called Dark Chronicle), and Twisted Metal: Black for eventual release on the PlayStation 4.
It is worth noting that Twisted Metal: Black has already been released as PlayStation 2 Classic back on the PlayStation 3 a few years ago meaning that this is likely the first set of many titles that will be making the transition to being playable on the PlayStation 4 though we can expect a full announcement from Sony later this week at Tokyo Game Show.