Nintendo doesn't need to publish it. They typically do not run with more than one IP to fill a market space. Since they already have Metroid Prime, it would be redundant to them to publish The Conduit.
I've always expected EA to step up BUT considering how hands off HVS wants the publisher to be, EA may not be a likely candidate. Look for a mid level publisher but with decent pockets that doesn't have a major IP in a similar genre. I'm thinking perhaps Namco-Bandai or even Sega.
The rEVOLution is not being televised







