Mummelmann on 31 October 2007
It's quite unlikely in the near future, since SE has had such tremendous success with the series on Sony products.
Multiplat is also very unlikely, SE likes to make quality games, and making games for 3-4 platforms at once can affect quality. Not to mention how expensive it is, and they're being a bit catious ever since Spirits Within sent them headlong towards bankrupcy.
