That's true, but one of the differences between Pixar and DreamWorks is that Pixar has said that they don't want to make a sequel to one of their films unless it is just as good or even better than the first film. I haven't seen much of DreamWorks films, but I don't think that they do that with their movies. Shrek alone proves that. Besides that, one or two sequels actually shows reasonable, depending on how well the movie does and how good the storylines are, while considering five movies after the first week or two after the first film just came out sounds a bit odd to me, to say the least.
