Could be.
I can easily envision the idea that there's a "Watchmen" universe that is essentially the prequel universe, not unlike the "alternate timeline" version of "Star Trek" from the Abrams movie.
That universe will be the one that teams up with the DCU.
And we will probably find out that the "prequels" are actually just tales from the alternate universe, where the events of the Moore novel may or may not happen someday (kind of like how DC couldn't decide for a while in the 80s-90s whether DKR was Elseworlds or not).
There is kinda one but it does have definite differences. It is the one that Allen Adam is from in Final Crisis:Superman Beyond 3-D. He looks like Doc Manhattan but not quite the same. I don't know if the other guys are more like their Charlton or Watchmen versions, though.
Long story short, after Holland's resurrection he decides to quit being a scientist, but before he could throw all of his work away, Swamp Thing shows up to explain to Holland the importance of the Parliament of Trees and other stuff.
Recommendation on a scale of one to ten?
