To put my views into perspective, let me explain what a group of UO Fans (Orlando Informer) are doing for a meet up in May. This event includes full Dinner, Unlimited Butterbeer and Ice Cream, A Private viewing area for Cinematic Spectacular and three hours in Diagon Alley for $124 plus sales tax. If I was on vacation then, I would pay for a chance to meet fellow theme park fans and the other benefits listed. To me, it's an experience that I can't do at home (no Mouse Meet in Baltimore/DC).
For $150 with WDW, this is basically an attempt to allow the public to have a corporate event experience. I won't spend the $150 for this event and I don't think the newbie fan or even 99% of us hardcore fans will spend this. Maybe there will be an extensive value where it includes food and drink, but I doubt it. This is going to fail in such a way they will have to either give tickets away to this or give a massive discount for it day of. Even Club Villain is at a similar price to the OI meet up and includes food.