“An HD remake of the original Halo game that celebrates the series’ 10-year birthday. The remake packs in co-op online play, completely re-mastered graphics and audio, Achievements and added story elements.”
That is what to expect.
Apart from:
More Easter Eggs.
That Skull.
Over-enthusiastic Rocket Explosions 
Terminals
New Maps
New Firefight Maps
(Will edit, correct me if I’ve missed anything)
terminals
I like the additions, especially that grunt skull, especially if we get multiplayer challenges that have us do LASO on a CEA mission.
> terminals
What do you think he meant by easter eggs?
> > terminals
>
> What do you think he meant by easter eggs?
I added it anyway. He was partially right though.
> > terminals
>
> What do you think he meant by easter eggs?
Thats not an easter egg. Easter eggs are thing we dont know about and have to find. Yes we have to find them, but we already know about them. IF we have to find skull in the game we mine as well consider that a easter egg as well, if that is your defination of an easter egg is what you think it is.
You dont have to act like a jerk.
> > > terminals
> >
> > What do you think he meant by easter eggs?
>
> I added it anyway. He was partially right though.
IM a girl 
> > > terminals
> >
> > What do you think he meant by easter eggs?
>
> Thats not an easter egg. Easter eggs are thing we dont know about and have to find. Yes we have to find them, but we already know about them. IF we have to find skull in the game we mine as well consider that a easter egg as well.
> You dont have to act like a jerk.
I didn’t mean for that to sound jerky, I was just saying that terminals could be considered easter eggs but I guess you’re right.
> > > > terminals
> > >
> > > What do you think he meant by easter eggs?
> >
> > I added it anyway. He was partially right though.
>
> IM a girl
Sorry, she was correct, I added terminals.
Is there anything else to expect? Or hopefully thats it. I’ll link people in future to this thread, if people do decide to speculate. (:
> > > > terminals
> > >
> > > What do you think he meant by easter eggs?
> >
> > I added it anyway. He was partially right though.
>
> IM a girl
Wut.
New maps? and the firefight one as well?
I thought that would be basic knowledge, i’ll add it anyway. it’s 4am. I have the excuse!
This may be a sub-category of “remastered campaign”, but the muthaf***ing OP Halo 1 pistol! 
> I thought that would be basic knowledge, i’ll add it anyway. it’s 4am. I have the excuse!
well you asked what should be expected and I answered 
Skulls in the game will be cool…
Only one skull has been confirmed, as far as I recall. I hope personally there is not. Remastered is remastered.