I've been thinking about this for a while, and a few things seem to make sense now that didn't before.
The GSM version has passed through FCC, while the i515 (Verizon version) hasn't made an appearance yet (I think this is right - someone correct me if I am mistaken). Then we've had all this confusion about "will there be 2 devices or not" and we're pretty sure it'll just be called the Galaxy Nexus, it'll be a single device, but that there will be a CDMA/LTE version headed for Verizon, and then a GSM version for other carriers and the rest of the world (since most networks worldwide are GSM).
It's all a little muddled though, with so many conflicting rumors, etc... until you remember something we recently heard Samsung's UK director tell T3: "“You will have an announcement of the Nexus Prime very shortly and will be seeing it in shops sooner than you think”"
It all makes me wonder - do you think it's possible we'll see the release of the GSM version overseas first, followed by American releases (including Verizon)? It would help to make some sense out of why they're announcing the product in Hong Kong - an Asian/European market release first, followed by a U.S. release (as happened with the Galaxy SII, also made by Samsung). It would also allow Google to usher in ICS to the world via their youtube live stream - but as to whether we'd see specific device details about the Verizon Galaxy Nexus, well, that's almost impossible to answer right now. One thing is pretty sure - we're nearly guaranteed to see some iteration of the next Nexus phone. They'll use the Nexus phone to demonstrate the ICS OS, obviously, but whether it would be the GSM or CDMA/LTE version, who knows.
I just wonder if we'll see the Nexus in the UK and Europe very soon after the announcement on the 19th, followed up by the Verizon version a few weeks later. I mean, what if the phone is announced on the 19th and goes on sale in a matter of days to a week or two after the announcement? That's totally possible in my mind. That would still put it out ahead of the VZW Galaxy Nexus which is rumored for a Nov. 3rd release date.
It makes sense, but there's really nothing truly concrete to back up this idea. I'm thinking out loud, but I can't help but wonder if this is how it'll play out, really.