That certainly will not happen.Nexus rumors are slowly starting to gain momentum.
I'm strongly believing the concept of multiple Nexus devices this year. There has been camera data supporting a model number that would match up with a "Galaxy Nexus Plus" or whatever it's to be called (which would be a mid-range phone).
I have a feeling they may just end up having a Nexus device from each of the top manufacturers. Nexus is evolving to be more than a hardcore-user/developer brand, and becoming Google's answer to the market conditions. They want "Pure Google" out there, but want to keep the open Android world alive too (i.e. custom themes/skins/baked-in-goods). It would be awesome if every future Nexus phone was also available on every network - but I have a feeling we won't be seeing that.
Maybe something like this will happen in the US though: (it's better than what we have now at least)
Galaxy Nexus: Samsung
Optimus Nexus: LG
Razr Nexus: Motorola
Xperia Nexus: Sony
"Whatever name the hell" Nexus: HTC
Of course you won't see the 5(if there will be that many) different Nexus phone devices on each US carrier. What could happen is the US carriers choose only one brand each cycle. Say Sprint chooses the HTC Nexus, AT&T chooses the Sony Nexus, Verizon chooses the Motorola Nexus, and T-Mobile chooses the Samsung Nexus...and so on.
Of course for something like this to work properly, the manufacturers have to release their Nexus devices near the same time period...None of the releasing a Nexus on a different carrier 6 months later with the same Nexus specs nonsense.
