If it's available on verizon, though with the track record they've had i'm not getting my hopes up.
I just like the idea of a nexus device, I wanted and waited for the nexus one (which eventually got replaced by the incredible) and I'm quite envious of my freinds on sprint who have the nexus s. I have no doubt google/whoever their partner is will come up with something great. it will look good, and have innovative, if unused, features (i'm looking at you NFC). Look at what's hot in japan, that seems to be something google really likes (QR codes, and again, NFC).
I just hope verizon's incarnation doesn't get pushed back into oblivion like n1
edit:
concerning screen size, I thought I would never want anything with a larger than 4" screen just because the phone gets so bulky. I hate the evo and droidx in the hand, but newer devices fit the large screen on a smaller frame. lg rev and my freind's inspire both feel really nice. when you conciter the removal of capacative buttons, a 4.6" screen could easily fit into the same device. Though with too small of a bevel the digitizer seems to become vulnerable (has anyone seen an aria older than 2 months without a shattered screen?) gorilla glass could counter this problem though.