Like we did in Halo 3. I loved it when the community was working together to find the IWHBYD skull by figuring out the sequence of rings to jump. I hope secrets like those during the launch of Halo 4 make people be video game detectives. That's quite fun. Although the longer the game was out pretty much all the secrets were spoiled. The best way to enjoy a game is usually around launch. There's so many things to discover from bugs, glitches, exploits, Easter eggs, secrets, also that anticipation of atmosphere.
Are we at least going to see the return of terminals with videos like we did in Halo CEA?
The only problem with the Terminals in this is that when you find them you have to open it through Waypoint. Which takes you out of the game. And from my understanding unlike other Terminals, these are far more connected to the game's story and therefore you'll really wanna find them. Bad design decision.