The DC filing and amicae briefs come first, since they are the ones appealing the lower court decision. Basically the "complainer" has to show their cards first.
Now Gura and his team can make any neccessary revisions of their brief, based on what the DC people and any "significant" amicae briefs (e.g. the Solicitor General etc.) Organizations and individuals, that Gura and his legal team have decided to accept Amicae briefs from, can also do some fine tuning on their briefs potentially addressing specific legal issues included in the briefs. (e.g. Not responding to the Brady's "Hosing down" kind of overheated rhetoric, but real legal issues and precedents.
Just to keep thing straight. The next big date is February 4th with the Heller Amicae briefs to follow shortly (1 to 2 weeks).
Direct from the Gura & Possessky PLLC law firm website:
"January 11th, 2008 by Alan Gura
Amicus Curiae briefs for the city have been filed and are now available on our filings page.
Next event:
Our brief, February 4."