Upon further review, the squid is indeed in the Watchmen movie...but you have to look very carefully and quickly.
Well, not the actual fake extradimensional alien telepathic evil squid thingie. But a little hat tip.
In the scene where Doc Manhattan is teleporting the reactor to Veidt's Antarctic fortress, watch the video screen on which we see Veidt. In the background behind Ozymandias, you see his scientists gathered in a gaggle, waiting for the reactor. Behind and above them is a sign, which reads:
Yes, it looks just like that, with the intial letters bold and large. Pretty obvious, but it's only on screen for a second or so (or less)...then the incoming reactor covers it up.
So, yay, squid!!
I wish I had an Antarctic fortress...