The name + the engine trailer makes me think they're going open-world. Or at the very least far more open-ended than any previous Halo game. This also falls in line with the rumors that 343 scrapped their plans for continuing this trilogy they were building with 4 and 5. The fact that the game is taking longer to develop would also make sense if they were truly building something bigger for the franchise.
Either way, I'm ready to see more.
Either way, I'm ready to see more.