So far the rumors point to a shortened final season 4, though I guess Silverstein has not confirmed a shortened season, for our Nikita. Apparently the CW Network likes to give shows closure when possible and we got lucky as season 3 was too far into production to allow a proper closure. So season 4 is reported to have 6-13 episodes.
I’m hoping for 13! Even better it could be followed up with a Season 5 It does appear that whatever happens we should get closure on the show. Hopefully the final season doesn’t disappoint like La Femme Nikita’s final shortened season.