It must be Justin Bieber.
I think i'd kill myself.
Personally I was quite happy with Max von Sydow's input on the trailer, and would be happy to see him take a roll in TES V.
Honestly though, I don't mind not seeing any big names at all, as long as the voice acting is good; i'll be happy.
Though with the budget Bethesda seem to have for this game, i'd be suprised if they didn't get a big name to voice it.
^_^