Japan Studio could definitely do it. But I don't know about the pulling power of it. If PC/Xb one owners are confident of getting Dark Souls 3 then I don't think they'd give much thought to Demon's Souls 2. After all they haven't played Demon's Souls, and among the people who've played both Demon's Souls and Dark Souls opinions are divided as to which one is the better game. Sure some people who wouldn;t have otherwise bought PS4 would buy one for Demon's Souls 2, but not as many as you think, IMO.
I'm not ashamed to admit that I don't think I could have finished Demon's Souls without the walkthrough guide that came with the Black Phantom edition. However, the game isn't unfairly hard, it's just unforgiving.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
