I'd say so. If they advertise it like their pst major releases then the difficulty/branding won't detter casuals, but the "core"following will get it no doubt, as well as make people who moved to the PS360 get one, hence causing a surge in console sales as well.
Overall I see Week 1 around 700k WW, First 10 weeks 4 mil, Year 1, 7 mil, and LT around 10-12million. So I see it doing quite well!
(ps. This is assuming that it's released in September)