@TheBrianJ  
I briefly thought that was a failed “G3 Rainbow is brain-damaged G4 Rainbow” joke.

@Mega Rapidash  
His notion of time is not linear. He sees everything happen at the same time, and if you want to see a good way to undertand it I would advise either to read the graphic novel (more specifically chapter 4) or watch the special edition of the movie, when he arrives on mars and explains every event that lead him to were he is. He talks in the present tense of everything that ever happened to him. And the tachyons blind him to all that knowledge. He couldn’t know ten years ago about it, because ten years ago he was already blinded, since time for him is a constant.
 
Also even when he sees what’s about to happen, he has the tendency to let it happen. Like a puppet that sees the strings, but chooses to continue with the charade. Because he lost his humanity bit by bit. And Ozy exploits all his remaining weaknesses.

@Stotter  
Yeah, that makes sense…

@Mega Rapidash  
Because it doesn’t matter when he’s looking, the cloud of tachyons are still there obscuring a fixed part of spacetime.

@armadiloeater  
Well, my only complaint was the tachyon affair; your explanation is good, but it still raises some questions: how far can Manhattan see into the future? How does his looking at past, present and future at the same time schtick works? Does he see all events in all three directions all the time and is unable to turn it off, or can he select what does he want to view? If it’s former case, then why wasn’t he able to see what Ozy was about to do decades before the tachyon particles reached his then-current era?

Totally how it would have gone if ratings didn’t prevent onscreen murder of foals. I was expected her to magically snap her wings and letting her fall to her death. ;p

@Mega Rapidash  
Because the point where Veidt creates the Tachyon wave is already blocked to Manhattan. He also explains this: the Tachyon wave travels through time backwards, by the point where the comic starts he is already blinded. That’s why he can get surprised by the interview where he goes nuts, and why he can’t stop Ozy in time.
 
I’m wondering if most of you criticizing Watchmen for being unclear only saw the movie, cause the short version of the movie truly is a little vague. I know it’s a popular opinion to criticize Watchmen, but saying that the plot in the most celebrated graphical novel of all times is nonsensical…

@RIG  
well in the movies it doesn´t look like he can create stuff from nothing, so it´s a big no for the rebuild after the fallout, and it looks that he can´t bring dead people back. He can change matter, but can´t create matter.

@armadiloeater  
What Manehattan can do and what he’s thinking is incredibly vague (he could presumably undo everything) and Veidt’s plan is also nonsense.

@Mega Rapidash  
Only Alan Moore knows.

@armadiloeater  
But if he could see the future, why couldn’t he predict that Veidt would try to block his clairvoyance before he did?

Starlight: ZA WARUDO…TOKI WO TOMARE! Prepare to die, Twilight!  
Twilight: Smirks  
Starlight: What…I can’t move!  
Twilight: I froze time at the nine-second mark! How does it feel huh? If you ask me, it’s like a diver coming up for air, only to be immediately pulled back down, but right now, I have no compassion nor mercy for you!  
Starlight: No…  
Twilight: ORA! (Kicks Starlight in the knee, send her flying) Time…can continue now.

@Vree  
… The whole story revolves around Veidt trying to fool Manhattan’s powers, and using them for his own goal. Tachyon research, Doc’s blindess, the scientist and artists designing the squid, the plot to make Manhattan leave earth… It was explained in details, don’t see how you can say their parts were “because the plot said so”.

@AaronMk  
All Starlight has to do is take away the parchment and Twilight can’t come back from teh future. She’s just trolling Twilight after the first few times.

@RIG  

Don’t even bring that up, for the (not THAT many) things Watchmen did right, Man(e)hattan’s and Ozy’s parts are pure unconvincing “because the plot sez so”.

so filly dash is baby hitler for starlight?

Strangely, bludgeoning Rainbow Dash to death with a tire iron resulted in the future looking exactly like Generation 1.

You’d think that just the implication of the next scene would constitute at least semi-grimdark.

@tigerrobocop  
*sorry i messed up a little, i was going to comment something else originally but i forgot to fully delete it.  
the comment below did not happen, thank you.

Am I the only one who think Starlight is a bitch?

@RIG  
Doc Manhattan can see through time, but can’t control it, he can’t go back. If he knew what was happening he could have prevented it, but Adrian Veidt uses the tachyon particles to blind him, so he can’t stop it in time. In the comics he explains that the events leading to Ozymandias’ plans are clouded to him, he’s not omniscient in that moment.

@AaronMk  
Time loops are exactly the right time to overthink everything.  
I love time loops stories(I think I’m gonna go read “Hard Reset” again after this), I never thought I would ever see an actual episode centered around it. “It’s about time” was a good appetizer, but this one actually went there, and took the opportunity to show things that can never actually happen. Glorious.

@RIG  
He couldn’t undo things, and his semi-omniscience made him too distant to actually get involved–hence why, for instance, he doesn’t stop Comedian from shooting that woman even though he absolutely could (and is called out on it), or just splatter Ozymandias all over the place.
 
It’s also implied that he actually has very little control over what is fated to happen, that there is no free will at all and the past and present are written. In fact, that’s one of the layers of the title. The timeline, and everyone in it, ticks down like…a watch. Like Einstein’s watch, or Manhattan’s own.

@RIG  
I think so, but I think he just stopped caring about human life