So you don't think under any circumstances, given enough time Reed and Doom with the knowlegde Ozymandias has concerning Dr Manhattan could find a way to either negate his power or disperse him in a way that wouldn't enable him to return for a significant amount of time?
If Ozy couldn't do anything to permanently put him down why would Reed or Doom? The movie versions aren't even majorly impressive when it comes to intelligence.
__________________ Chicken Boo, what's the matter with you? You don't act like the other chickens do. You wear a disguise to look like human guys, but you're not a man you're a Chicken Boo.