Well, i'm just guessing, but I'm sure it will include general Trav info (what the 3rd Imperium is, a timeline, what kind of tech is available, etc) but we'll need to wait for a sector book for the setting and world info.
On the other hand, Traveller is Traveller so any setting published in the last 25 years can be co-opted.
That's what I plan to do!