Leper Messiah TR said:
in the comic Veidt played everybody, including all-powerful Manhattan, which is an ending the reader would not likely forsee (I sure didn´t)
also the way Manhattan leaves Earth is so much more interesting and meaningful
yes he is responsible
wikipedia:
"He explains that his plan is to unify the United States and Soviet Union and prevent nuclear war by destroying the world's main cities with exploding energy reactors he had Doctor Manhattan create for him under the pretense of providing free energy for the world. "
(although I can not remember this happening in the movie, DC only?)
which means Manhattan is in on the plan
and if this isn´t significant, what is?! Han shooting first? The force not being a biological phenomenon? I don´t think so!
1) Veidt still totally plays Manhattan. He plays him harder, in fact.
2) Doc still leaves for the same reason. There's just an added wrinkle as well.
3) Doc is not responsible. If I make you a pizza, and then, unbeknownst to me, you put poison in it and murder someone, am I responsible because I made the pizza? Manhattan wasn't in on the plan AT ALL. Key phrase here: "UNDER THE PRETENSE of providing free energy to the world." If Doc was in on the plan, why would he be mad at Veidt at the end?
4) Well, Han shooting first isn't that significant, really. In the grand scheme of the story, it isn't that big of a deal. The reason I still like the original cut is that the original cut is the way I first saw it, and that's the cut I like. The Force as a biological phenomenon, on the other hand, DOES significantly change the story. Something which is supposed to be a mystical energy that guides and binds the galaxy, is instead just a superpower generated by a bacterial infection. Midi-chlorians degenerate the concept of the Force from a theological precept that HAPPENS to give people powers, to just a superhuman mutation. The ending to Watchmen, on the other hand, really doesn't change any of the thematic subtext, any of the character arcs, or anything noticeable about the story, except for the specific facts of Veidt's method. The story is not about the facts of what happen; it's about much deeper concepts than that. And the nuke ending doesn't damage those concepts.