To answer a few questions:
1) Yes, the unseen characters Wild Bill, Lift-ticket, Ace and Slipstream were meant to be in their respective vehicles (with Airborne as Dragonfly gunner). Thanks for spotting that!
2) One Joe fan pointed out that Starduster was missing. He and The Fridge were just mail-ins but Starduster did in fact get a mini-comic. The Defiant and MCC were just too massive for this picture and I hated to leave out their drivers, but sometime down the road I may get a chance to revisit those 2 beasts and the others mentioned. We'll see.
3) I do hope to address the characters from '88 to '91 at some point down the road. But I gotta get the Cobra poster done first! :)
4) As to larger poster prints...I honestly don't think the image would benefit. After you get your Joe posters, please let me know what you think, but I personally think this works best. Also, my current printing arrangement helps keep costs down, but a larger poster would incur a much higher cost per copy.
Thanks again for all your great comments, guys and gals!