2k has clarified that the "Xbox 360 and PS3 only" language on the releases about crew and My Team was to differentiate those versions from the PC version being released on Oct. 1. They said that they haven't release any info on next gen.
That's not to say that crew or my team is guaranteed on next gen, only that we don't know whether it is or not.
Basically, if Crew is the mode that makes you decide on Live or 2k, you can't rule out Crew being on 2k for next gen.