I'm ready, how bout you?!
I'd like to see the Re-Terraforming of Reach as well, and a couple of plot "nuggets" could be tossed in, such as...
-Noble 6's Helmet is discovered (The finding would be similar to that of Jenkin's from CE)
-Finding the Forward Unto Dawn , but the Chief is gone and a Rampant Cortana remains, unable to disclose his whereabouts, but hint to him being recovered by "A Spirit made of Fire"
And the destruction of the Flood and the Rings to cap it off.
[Edited on 11.15.2010 3:13 PM PST]