I'm less optimistic about it than I was with LittleBigPlanet.The only common trends amongst user generated games will be the kinda fuzzy graphics/art style, and the little floating character used when editing.
One thing I really liked about LittleBigPlanet is sackboy. They had an endearing character to go along to connect with and customize.
I am pretty much avoiding news and shows about Dreams, but I have not seen anything like that to connect with.
If reviews are really good, I'm sure to get it. But, otherwise I'm not really feeling as good about it.
I think they teased some stuff about the campaign and it didn't really interest me at the time.