You do know that DOS DD is immune to all energy projection because his past fight with the Radiant right? And there is no physical force in his punches that can equal to the might of Superman's. It even took probably hundreds, if not thousands, of Superman powered blows to put DD down. So there is no technology Ironman can come up with to be able to hit DD with hundreds of Superman type force blows. Plus there is no defense that would prevent DD from killing Ironman at speeds than even Superman can't react to. DD's power and speed is too great for Ironman. So no amount of prep would do Ironman any good. There are absolutely 0 ways for Ironman to win.
Characters get more powerful over time. The people DOS DD fought weren't at the level of the ones we know today. Moving Mach1 was shocking in that arc.
You do know how many registered heroes there are right?
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Yes I understand and agree.
But the physical power of DOS Supes alone back then still drawfs that of which Tony can try to come up with in his prep. Not to mention that Supes used hundreds if not thousands of strikes to take DOS DD down. DOS Superman hits harder and is stronger than current Tony can ever achieve in prep (IMHO). Remember this Supes can still lift over a billion tons (as proven by John Byrne). Roger Stern even stated in his book that the laser that mankind shot at DOS DD with was way hotter than the core of the sun and then guns were very high powered armor piecing weapons. Yet no effect. Plus the Radiant's pure energy >>>>>>>> than anything Tony can blast out or create.
All of this is not to mention that DOS Superman has much greater reflexes than that of Current Ironman. If DOS DD was able to hit this Supes (Supes even complained of his speed) before he can react then he most certainly can hit current Tony. For only sufficient physical force or BFR could beat DOS DD (and no energy projection whatsoever).
It is faulty and bias to assume that one can beat another with a certain tactic when it hasn't been shown what limit the other has to this tactic.
DOS DD hasn't shown any limit to resisting energy projection. He only showed a limit to the amount of physical force he can withstand. So to say that since character's are much stronger now isn't enough to logically show that the current character can win.
I think he meant the power of the Reality Gem, he is right though in saying DD will have no defense against it.
I said before that placing Iron Man in a situation like this with this amount of prep and reasources is overkill for a lot of characters, including Doomsday. And to say DOS Superman packs more power physically than anything Tony Stark can come up with is utterly absurd, how can Superman demolecularize Manhattan with punches?.
Iron Man has the speed/reflexes nowadays to keep up with nearly anyone. Iron Man can react faster than Superman too because Doomsday isn't faster than prescience.