You think you have lag?...
...It took Jesus 3 Days to respawn
I personally would like to see a few of the campaign levels (assuming there will be any) covering the prequel to the SPARTAN II program. The novel Halo: Fall of Reach spent many chapters showing the candidates being chosen, trained and sent on civil war scenarios before eventually culminating with the battle on Reach against the Covenant.
The first few levels should show this initiation process:
|| Perhaps a training level as a child with CPO Mendez yelling at you while you clamber through the obstacle course to the bell.
|| Through the augmentation process and the pirate encounter on the asteroid (I forget the ex-Colonel's name they were sent to capture) to the first actions in MJOLNIR armour.
|| With the final part of the campaign taking place against the Covenant on Reach.
I would say however, that in my opinion it's doubtful Bungie would rip the pages of Eric Nylunds novel directly into a game format, then we really would know the end (as well as everything else) before the beginning! It's likely we'll be in control of a lesser mentioned contigent of Spartans. But that is purely a hunch.
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What about everyone else? What do you want to see?
[Edited on 06.05.2009 10:32 AM PDT]