According to the UK game publication PLAY, sequels for Sony’s franchises God of War IV and Syphon Filter 4 will be officially revealed next month. Whether this is pure speculation or just some kind of rumor, your guess is as good as mine.
The magazine reported both titles will be confirmed for a Christmas 2012 launch. PLAY claims that the new Syphon Filter 4 is not being worked on at Sony Bend as originally thought, but instead at SCE Studio London. God of War IV will supposedly include some form of online play, with recent reports suggesting a co-op mode featuring Kratos and his sibling.
Via Game Freaks