This shit cray. If Demon's Souls 2 is even a remote possibility I will soil my panties.
1. Sony's SCEJ internal teams worked directly with FROM and Miyazaki on the first Demon's Souls. Takeshi Kajii was influential in the game's core design in fact.
2. SCEJ employees (including Kajii I believe) have said they wanted to do something with it. SCEJs management has said they regret not supporting the IP more and that they'd be interested in doing something more with it.
3. Frequent rumors from solid sources that SCEJ is working on two RPGs.
4. Recent rumors that SCEJ is working on a new internal title involving staff from the Soul Sacrifice titles.
Add the frequent rumors about Demon's Souls 2 happening and that's a lot of smoke pointing you towards the fire.
A combination of art staff from Team Ico, Soul Sacrifice, and the SCEJ people who helped on Demon's Souls would be very interesting.