It makes sense for Daedric symbols to be in the title, since the main quest revolves around fighting off a Daedric invasion.
Did you notice the IV in obl IV ion --- as in TES IV.
Pretty clever, huh?
Not really. The same thing was done for the title of http://upload.wikimedia.org/wikipedia/en/1/18/Phantasm_4.jpg back in 1998. I never even saw that film (just previews), but that's still the very first thing I thought of when I saw the title sequence of TES IV Oblivion.