If these rumors are true then I will be very happy.
http://www.nowgamer.com/news/2385768/ps4_is_project_beast_the_rumoured_demons_souls_2.html
http://www.denofgeek.com/games/demons-souls/30356/demons-souls-2-coming-to-ps4
Wait... wasn't Demon Souls 2 already called Dark Souls 1? :P
No actually. Sony owns the license to Demon's Souls but From Software realized what a hit the game was and obtained the rights to use the engine to create Dark Souls and later Dark Souls 2. Demon's Souls 2 is Sony realizing their mistake of not capitalizing on Demon's Souls success. This would be a PS4 exclusive.
By the way, if any of you have a PS3 I highly recommend getting a copy of Demon's Souls. Yes it's a game that came out nearly 6 years ago but in some ways is superior to Dark Souls.