6) A great bit of story
It seems to have lost its way of late, but the Halo of old had us desperate to find out just what might happen next in every single sequel. It hasn’t been without its contentions though, and certainly the abrupt and vague ending to Halo 3 was a sore point. More recently, Halo 4 tried (and succeeded to some degree) to bring something of a human element to the tale by effectively giving John 117’s brain-Smurf a spot of Alzheimers. Then she dies at the end. Spoiler alert.
We really need something to get out teeth into again. A reason to care other than X alien wants to kill you for X reason, so shoot him in the X first. There’s plenty of lore to build on, and plenty of questions still to be answered. Even more now, in fact, since the first piece of teased artwork apparently shows a brand new – a quite obviously central – character. Hmm.