That doesnt mean some parts of a rumor can't be true while others parts arent. I tend to belive the collection is real, though I think Galaxy 2 will be included. I also think its quite possible that the 3d World port won't include new content at all, but actually might include 3d Land. I could see three separate packages: 64 & sunshine, galaxy 1 & 2, and 3d land & world. I also don't think the Pikmin 3 port will include any new single player content. It just doesn't make sense when we know 4 is coming.
Im on team fake for the Prime Trilogy HD though.