I'm watching Alone Against A.I.M right now for the 2nd time and I've noticed something interesting, which left me wondering: did Yost or Fine had any plans for Tony's RT paladium problem (like in IM2 film), cause it does look that way:
But the situation changes rapidly (the lines are disappearing and appearing from Tony's chest almost in every shot of the episode). Perhaps, because of Loeb and co. coming onboard, Yost and others couldn't expand on their ideas and the separate Iron Man arc (if they even had one, of course) and that's why it was left unresolved.