Okay, here's a plot outline a worked out just now combining the Frost script, the new script, and Sardaukar's idea:
Doom has been planning for years to take back Latveria and he is finally ready to do it, using his company's resources. To accomplish this, he's going to install a weapon on his pre-existing space station [This part does sound cheesy, but it explains why the launch occurs so quickly and why Doom comes along. If anybody comes up with a less-corny explanation, feel free to share it] and use it to take Latveria by force. The only problem is he needs an excuse to be up there so that no one will suspect anything. Enter Reed with his research mission, and Ben as his pilot. Doom has a history with the two, but realizes this is exactly what he needs for his plan, so they go ahead with the mission, along with Sue and Johnny. The accident occurs ala the Frost drift, except with Doom leaving in the escape pod like in the new script. The only difference is, instead of organic armor, he has been scarred, though we never actually see the scars. When he lands, he covertly returns to his company (Not on a stolen motorcycle!), leaving everyone to believe he has gone missing (or maybe the pod crashes and they think he's dead). He dons his armor, which he had already created to protect himself in his annexation of Latveria, forges his mask to hide his face, and decides to proceed with his plan, albeit with a newfound hatred of Reed, who he blames the accident on (though his scarring is actually his own fault). This all occurs in complete secrecy, no one being aware of his endeavors aside from a handful of scientists/engineers that he murders later on. Meanwhile, all the stuff from Frost's draft with the Four happens, setting up all their characters. Finally, in the third act, Doom carries out his plan and it is up to the Four to stop him. The ending I'm not so sure about, but I think it could involve Doom being defeated, but still getting away. Then, at the very end after Reed proposes to Sue, Doom could be shown something like "Commence preparations for Plan B, " or something, but less cheesy. Thoughts?