"Well due to the fact that CBS aired the SERIES Finale version a Season 3 is not plausible. Here’s why:

With the bomb in custody of the Texas Republic, It will surely be examined and J&R/Cheyenne will be exposed.
Texas will then join the USA.

As news of the corruption of the ASA breaks out, The USA and other nations will side against the ASA.

Furthermore the people of the ASA being former USA citizens and residents will surely be “less cooperative” when they realize their new government is a sham. (Very similar to how Major Beck and his men reacted)

The ASA with no foreign or domestic support will crumble as the world’s armies and domestic insurgents descend upon Cheyenne.

The people behind this conspiracy will most likely be captured tried and convicted of their crimes.

They will be sentenced to death via radiation poisoning. Their executions will be broadcast live on Pay-Per-View for $19.95 ORDER NOW!

…..Ok that last part is Bullshit, but the other stuff seems to follow a logical process for why a Season 3 will last all of 2 episodes. 2 episodes I’d like to see though.
"

"There could still be a third season. The writters are very creative I'm sure they'll think of something. Or they could just air the alternate ending if it gets picked up. I don't know about you but I'd be willing to forget ever seeing that last episode."