Ever since Steven Moffat wrote that throw-away line in "BLINK", I suppose it's been in the back of all our minds, but Sam Draws actually went so far as to draw the logical comparison.

Says Sam, "Doctor Who is sort of the opposite of Scooby Doo- everyone thinks that nothing’s up, but it’s always actually aliens. …Also instead of a bunch of teenagers, it’s just this one really old guy. Man, just for once I want the Doctor Who villain-of-the-week to end up being a guy in a suit trying to to scare people away from buried treasure, or attract customers to his amusement park or something."

I'm not sure Sam has thought that idea through though because without aliens or monsters it would be a pretty ho-hum episode, though the Doctor trying in vain for most of the episode to convince other people that the threat or baddie of the week was in fact an alien has happened many times....