when are there going to be custom forge maps

in rotation? the maps look great, but there is no opportunity to play them. are we expected to play them in custom games only? or are there people right now working to find out the best and most balanced custom forge maps made by the community? halo 4 has the best forge and forge maps yet, i would love to see a well selected community matchmaking playlist on there, with new maps every week, and maybe even some in the other regular playlists. thanks for reading