The reports about there being a deal for Comcast to acquire NBC Universal have been categorically denied. That doesn't mean it won't happen, but rather that it hasn't, and so the reports have no credibility.
They are two fine companies, and both very much focused on their primary obligations, i.e., their fiduciary responsibilities to their owners. When companies do well for their owners, as these two companies typically do, some mass-market consumers paradoxically get frustrated that they aren't personally sharing in the success of those companies, despite not having being investors themselves. That doesn't make the companies bad companies. It makes them responsible and successful companies -- companies worth of envy. Both companies have shown steady revenue growth through the deep recession. That's an admirable accomplishment.
I think also that Comcast does seem to be a natural home for NBC Universal. They've been moving more and more into content distribution. They already own E!, Style Network, G4, Versus and several others.