I'd rather have Samsung make the phone. They are the only manufacturer besides Apple who can make a super powerful device that's thin, has a really good display, and can last all day battery wise.
Here's what I want for the Nexus Prime:
Samsung
4.3-4.5 Inch Super Amoled Plus
Higher than WVGA resolution w/ HD Aspect ratio
Dual-core processor (anything but Snapdragon)
Super thin frame
Best cameras on Android phones yet
No plastic glossy finish, make it aluminum or textured at least
Big battery
Available on all carriers at launch. AT&T & Verizon models have 4G LTE.
Available in white, black, and silver
It's very possible to Google to do this, but since the phone will launch AFTER the iPhone 5 (most likely), it won't have nearly as much attention (except by nerds like us). I really hope ICS ties Google TV together with smartphones and tablets so we can stream our games/videos wirelessly to our TV. I also hope they do some quality control on the Android market and get more developers on board. Honeycomb has been such a joke.