343i has stated that there will be dedicated servers , so look there are larger maps , more players and maybe more vehicles and weapons.
Start the Campaign :
Only to say that it will be amazing ... I trust 343i
multiplayer:
As mentioned earlier a variety of weapons , armor abilities , vehicles, larger maps . (but much larger )
Forge :
More maps forge, more items to put on, budget and number of objects that you can insert very very large ( very large ), ability to save favorites in a section of a whole structure in edit mode created by ourselves so you do not spend time recreate it. Finally the icing on the cake ... moving parts , for example we operate a computer that allows you to open a door ( 343i I hope I can improve it special because I could not define it well).
Here's my wish list.
PS: I know that this is not the site of 343i , but I thought it was a good thing to post a wish list .