So so far I haven’t heard talk of easter eggs on this game, Past games have surprised me, Flying a Pelican and a Phantom, Data and audiologs in Reach and ODST, IWHBYD skull in Halo 3 and farther past, Halo 2 Scarab Gun and Jason Jones Dancing on his boxers.
Haven’t heard much talk of easter eggs in Halo 4, Only terminals which don’t sound fun. So what fun secrets and eggs are on Halo 4? For me, I don’t think anything will beat Pelicans and tribute room.
Well this one time on Reclaimer ( i believe that’s the rocky desert environment with the mind blowing revelation half way) i stood in front of a marine and he say did this:
“Hey Chief, are you a BR or an AR guy? That pro pipe is wicked but that Stick Det is crazy”. xD Something like that.
This was without IWBYD skull on. 
the t-bagging holograms? lol
> the t-bagging holograms? lol
That’s not much of a easter egg, While its funny its just a feature to make holograms more convincing.