All the sass

Look up the mocap things of him doing the voice it's beautimazing

I remember hearing who Smaug's voice actor was but as I had no frame of reference for the name it meant nothing to me. Now that I know who it is, and you've reminded me of the name... MIND. BLOWN.

Also, Benedict Cumberbatch is Dr. Strange and Martin Freeman is a CIA agent in Black Panther so they may meet in the Marvel Universe as well.

Bebeditch Switchersnatch is Smaug while Dr. Stephen Strange is Seseswitch Bwitcherbnatch.
I really wish he could've been the Balrog... that joke would have been so much smoother.