Okay, so seeing how next gens gonna be the bomb shiggidy and all that, I was thinking about armor and how it could more creative than just aesthetics.
Whats one thing we gamers love than anything? Customization. As a gamer, I want to emerge myself into the game as much as I can to make myself stand out from the rest.
You look at the back of every helmet in the Halo 4 armory and see that AI slot? Well how about we actually make AI happen for us in Halo 5? Just for things like SpOps and firefight. We pick what type of AI male/female, personality and maybe… just maybe a look, then they help us out and talk to us and maybe joke around 
Another way is to make us feel like we’re in an advanced suit of armor, that we’re not just a camera on a stick lol. Make it so we’re able to activate those team signals with the green, red, amber, lights so we can co-operate better with our AI helping too. (I’m keeping my fingers crossed for my S.P.I.)
Sorry if that went on too long, But feel free to add on your ideas to make the armor better!