I wouldn't worry about not getting Sgt Johnson, people will whine and he will be available to all eventually. Just like Recon and Bungie being all adamant that nobody will get it unless They grant it to them... more hot air and bollocks from your sugar daddies in Kirkland.
The GoW2 Flashback maps for free was apparently only going to be for people who bought the game brand new... whatdyaknow? Now on the MP for 400 points, and there was the Xbox.com glitch which let everyone download the pre-order bonuses for free.
For the record - not preordered, not going to buy, not interested.
[Edited on 07.05.2009 9:01 AM PDT]