I could too make a bunch of "crazy" predictions, picking a ton of characters (the majority of which) no-one in their right mind would pick. Mickey Mouse being a prime example of this since he didn't even originate from videogames and thus isn't eligible for Brawl. To be honest I believe the entire point of these predictions is to make people reply, and thus create a popular topic, on making stupid predictions. Nobody thinks that 5 more Mario characters will be added, especially not characters such as Dry Bones and Raccoon Mario. Daisy and Waluigi are really unlikely on their own, let alone both of them along with Bowser Jr. and the aforementioned.What's wrong with having an opinion?
If the topic creator actually believes this list, then really I have to feel a bit sorry for him. However it could easily just be a bit of a joke/flamebait topic created to get a lot of replies *shrug*.