Heroes reportedly, will only get a 19 episode season, and they'll run without a break. So Chuck's 13 eps gives NBC 32 hours for the season, rather than the 44 a full season for both would generate. ..Their penny pitching pays off, at least for them...So it's replacing Heroes?
I would be totally down if they did a Heroes/Chuck season or something similar. As long as I don't have to wait a year more for a half seasons like with BSG.