If there are skulls in Halo 4 (we can assume there are), would you like to collect them or possess them from the start? Personally, I find retrieving skulls a fun challenge. It was a disappointment how Halo: Reach had preset skulls. What do you think? The same discussion can be used for Halo: Combat Evolved Anniversary which is known to include skulls.
LOOK FOR THEM. Preset skulls are a huge disappointment.