Reach level customization

I keep hearing the phrase Halo reach level customization thrown about, but I find this to be quite vague. I interpret 3 different possible meanings to this: one they think Halo 5 had too many options (200+ helmet options in 5 up from about like 20+ in reach) and they are making it more manageable and getting rid of the fat. I’m looking at you goblin, legionnaire, and foehammer helmets.
Two we will see customization available for the campaign
Three, we will be able to customize things like arms and chest and such separately.
Well what do you think it means?
Personally I wouldn’t mind all three but I’m really hoping for#2+#3

Hey OP, we already have a few topic discussing this at the moment. Feel free to use one of the active ones, thanks