http://blogs.halowaypoint.com/Headlines/post/2012/11/08/The-Halo-Bulletin-11812-.aspx
Yep, you heard that right, the return of SWAT! Or should I say the introduction of SWAT in Halo 4?
Beyond that BS Angel talks about weekly updates to playlists and rotational playlists based in part on population of those playlists.
-Sal