Haha splitscreen Demon's Souls would be so weird. I don't know if that would be a good experience at all. Plus the mechanics of the multiplayer just...don't lend itself well to that in the slightest.
Not to mention the framerate would most likely drop so much as to make the game unplayable.
--
http://img.imgcake.com/AitchDeeTee/panicdancegifta.gif
http://backloggery.com/herodeltiempo/sig.gif