No one has said for sure it will be called 'V35 GT-R' or even 'V36 GT-R'... or something else entirely. I know since 2003 I've been saying 'V35 GT-R', but as we get closer to the launch date it's becoming more clear. I think if you scan all the info on these forums it pretty much sums up the situation: it is almost 100% certain that the next GT-R *won't* be called 'R35', also too, the development of the next GT-R is starting to take on a whole different model approach (hence what I wrote above)... yes thats right, the next GT-R seems to be shaping up as it's own marque, the fact that Nissan have used V35 running gear for all it's test mules is misleading, I think the Next GT-R will have too many parts to differentiate itself from the rest of the Skyline lineup to warrant a *completely different* chassis code.
But I mean really, who cares about the chassis code? There was a time when EVERYBODY was saying 'R35 GT-R' and they just assumed that the GT-R lineage would just seamlessly continue from R34 to R35... this I think is wrong. From what I know now, the next GT-R will be a different model, able to transcend traditional maker stereotypes eg: no longer 'Nissan Skyline GT-R'. The fact that Infiniti will sell this car too means that the GT-R will forgo it's Skyline connections, although retaining styling cues and marketing strategies so as not to scare off the current GT-R owner.
It's a bit complex, and I just want to reiterate that Carlos Ghosn still has the ability to change the direction of the next GT-R depending how well the 2005 GT-R concept is recieved at the end of the year. I don't want to give away any more than that.