OK, this sounds like it's going to happen and I can't wait. My wish list would be:
1. Background: I don't mind it being changed to keep up with events ITRW, the asteroid impact sounds like the sort of fillip that would kick-start an earnest effort in space. Just don't radically change the background, please.
2. I'd like to feel the size of star systems. In Traveller, every system is a main world which feels more or less like suburban America with some quirks. Star systems are huge and I'd like to make each one interesting. That means good maps of each main world, a system diagram and a little on adventure possibilities within systems.
3. A roleplaying, reasonably abstract space combat system, rather than a tactical game (which would be nice, too, but used less often in the sort of game I run).
4. Good quality ship deckplans. Laurent visualising the ships and vehicles.
5. More computers and transhuman space type technology, but not so much as to destroy the flavour of the setting. A knife edge, to be sure. Some colour pieces on aspects of everyday life in the Core and on the frontiers would help set the scene of everyday life - a bit like Andy Slack's "Wired Society" article.
6. For the Nearstar map, include the work done on the NSII project to clean up the data and the interesting extensions to the map suggested by Anders in his review of 2320.
Good luck. I can't wait for this, so I'm using the 2320 background and a hybrid MgT and Fudge rule set to start a campaign now. Can. Not. Wait.
Glad you're writing this, Colin.
John