Now that Bungie’s moved on to bigger and better publishers, some say Halo won’t survive for long. Those people clearly don’t understand this industry.
No matter who’s in charge, there will always be Halo fans that legitimately care about the series’s fiction. Bungie and others have spent a decade crafting a pretty fantastic story, through the games, comics, books, anime and more, and despite a satisfactory ending to Halo 3, there are a lot of places the Chief can still potentially go.

A Toast to Onyx
One of the most popular (and probable) guesses so far is that the planet-sized structure glimpsed at the end of the recent Halo 4 trailer is actually Onyx. The “shield world” featured heavily in Eric Nylund’s official 2006 novel The Ghosts of Onyx, and it’s where the few remaining Spartan IIs and IIIs – including favorites Kelly and Fred – will be found. The all-important Dr. Halsey, who made her first in-game appearance in Halo: Reach, was also last seen on Onyx.
The only problem is that Onyx was sort of destroyed at the end of the book. The entire planet turned out to be made of millions of Forerunner sentinels (the same flying bastards seen throughout the games), who disengaged from one another and decimated a Covenant fleet toward the novel’s conclusion. Halsey and the rest of the Spartans found themselves trapped in a dyson sphere – an inverted planet in a slipspace dimension adjacent to ours – searching for a way out.
The Chief would no doubt be thrilled to reunite with his oldest friends, and Ghosts of Onyx left plenty of unanswered questions. If there’s even a slight chance Halo 4 will answer them, Microsoft’s going to get even more of my money. There are a couple other options I can think of, though..

A Four-Legged Marathon
Halo 3′s ending was hardly ambiguous, but there was one aspect that left some questions dangling in our minds: beating the game on legendary unlocked the briefest of teaser videos showing Cortana and the sleeping Chief’s busted-ass ship approaching a planet that looked more than familiar to long-time Bungie fans.
You see, Halo wasn’t Bungie’s first series. Many of you probably know this, but back in the ’90s the enterprising developers made a series of Mac games (what? why?) called Marathon. Thematically, they were pretty similar to Halo; the Marathon games teemed with lone super soldiers, rampant AIs and millenia-old sci-fi structures. And the planet that makes its cameo in Halo 3′s secret ending has a pretty big Marathon symbol on it. The inclusion of this otherwise pointless scene fueled the already-widespread speculation that the Master Chief and the protagonist of the Marathon series are one and the same. Despite Bungie’s repeated claims otherwise, Halo is in Microsoft’s hands now, and number four may well tie neatly into the Marathon series.

Something Completely Different
Of course, it could always be about something else entirely. Although it seems 343 Studios would be missing out on some incredible narrative opportunities if that’s the case, they’ve probably got loads of perfectly decent ideas that have nothing to do with “the story so far.” Say goodbye to the other Spartans, screw Dr. Halsey’s mom complex, and forget the forerunners ever existed. After all, it’s Microsoft we’re talking about. Selective consumer amnesia is an important part of their business strategy.
I’m sure there are plenty of other good ideas out there, so lemme have’em. What have I forgotten?










