The right question is not who would or could join, but who does Iraq think will join?
And remember -- we're talking about Saddam when we ask that question.
When he was 12 he couldn't go to public school due to being an oppressed minority. His grandfather gave him a service pistol, a 45, which Saddam wore to school, thus allowing him to get an education. Tough neighborhood.
Unfortunately, once that path is chosen it is next to impossible to change routes later. He is kind of stuck.
I believe he will stick to what is legal. Of course he may think that Israel is an illegal regieme. Just as he thought that Kuwait was legally part of Iraq.
Can't take this to court if he doesn't recognize a court's jurisdiction. This reduces the possible routes of resolution.
He could step down and take refuge in Paris, that's not unheard of. Pass the scepter to the next generation and wash his hands of the whole deal.