Variety reported Cynthia Littleton tweeted this two hours ago:
"FWIW, nothing solid yet but "Community"-NBC talks continue and indications seem more hopeful than earlier in day."
Deadline.com reported yesterday afternoon that Sony were in negotiations regarding picking up their pilots and renewing Community. Blacklist is supposedly NBC's best drama pilot and it's from Sony, and NBC want to pick it up. NBC won't decide the fate of their other pilots until they finish their business with Sony regarding Blacklist, Community, and the other Sony pilots. Sony are very famous for cutting great deals to networks to get their show's renewed for syndication purposes.
I looked around Twitter and many TV insiders with knowledge of how NBC have negotiated in the past regarding cult shows/shows with low ratings believe that Sony and NBC are haggling over the episode count for Season 5, and that Sony will likely be willing to completely cut the license fee for a higher episode order to get more syndication episodes. There's also talk that the Blacklist pickup will tie in with a Community renewal.