The rumoured partnership between Sony and cloud gaming specialist Gaikai could be to bring more PlayStation and PS2 titles to current formats.
Sources have apparently told GamesIndustry International that the service will include past first-party games and will allow third-party publishers to sell their back catalogue to PS3 owners.
Publishers that have already signed up to Gaikai's PC offering include Electronic Arts, Ubisoft and Capcom.
Rumours of a Sony deal with Gaikai emerged earlier this week. It is not clear if it includes PS Vita or other Sony devices, such as TVs and tablets.
The current model of PS3 is not compatible with PS2 games. Limited compatibility was featured in the launch models.
However, Sony has released several HD updates of popular PS2 titles, including Ico, Shadow of the Colossus and games from the God of War and Jak & Daxter series.