My Halo 5 wish list:
• As a longtime Halo fan, I was disappointed by the overall A.I. of the elites in the campaign. They were too scripted and would throw an unlimited amount of plasma grenades upon first seeing me. This fault wouldn't have been too bothersome if they only carried two grenades, but their scripted nature made killing them too simple and unrewarding, especially on legendary.
• Since the Halo array does not kill Flood, I would still like to see them incorporated into the gameplay and storyline, not just as a background story.
• Besides a small reference at the beginning of Halo 4, there was little mention that the Covenant forces that were being faced were a completely separate sect as that led by the Arbiter. With that being said, I'd like to see him make a return, even if just as a cameo to reinforce that humans and elites are still allies.
• I loved the introduction of new Forerunner weapons, maybe now a Forerunner vehicle?