Millenium said:
However unfortunately it's not as simple as that, a lot of PS2 titles will need some updates because they won't be able to run natively on the PS3/PS4 hardware, which would be a fair bit of work. |
It's worse than that, it's a pain to re-release something. For instance, Capcom just can't release X-men vs Street Fighter again, unless Marvel agrees. Even if it's the PSX port or something. Plus you have to look into what contracts you've had with voice actors and other people to see if money from the re-release have to go to them. Games have to go through a QA to make sure they work properly. Lots of pains to release a game.