Edit: Halo Waypoint Listing
https://www.halowaypoint.com/en-us/community/blog-posts/launch-playlist-details
Warzone:24 players on massive maps with REQs and AI adversaries. Halo multiplayer has never been bigger.
Maps: Escape from A.R.C, Raid on Apex 7 and March on Stormbreak
Warzone Assault: Destroy the Power Core or defend it in this asymmetrical Warzone mode variant
Maps: Dispatch, Array and Summit
Team Arena: Play on the very best modes and maps Halo 5 has to offer.
Slayer: Work with a team, vanquish your opponents.
Breakout: Halo 5's premiere high lethality single-life elimination mode.
Free For All: It’s you against everyone else. Slay your way to victory.
Swat: No shields, no motion tracker. Aim for the head!
Weekend Playlist: A weekly playlist that features a mode voted on by the community via Halo Waypoint/Channel.
The weekend social playlist will features modes selected by the community, and offer bonus XP and REQ Points. Additionally, the most popular modes have the potential for becoming their own playlist.
In regards to BTB
http://www.ign.com/articles/2015/10/13/halo-5-to-get-custom-big-team-battle-maps
https://www.halowaypoint.com/en-us/community/blog-posts/launch-playlist-details
Warzone:24 players on massive maps with REQs and AI adversaries. Halo multiplayer has never been bigger.
Maps: Escape from A.R.C, Raid on Apex 7 and March on Stormbreak
Warzone Assault: Destroy the Power Core or defend it in this asymmetrical Warzone mode variant
Maps: Dispatch, Array and Summit
Team Arena: Play on the very best modes and maps Halo 5 has to offer.
Slayer: Work with a team, vanquish your opponents.
Breakout: Halo 5's premiere high lethality single-life elimination mode.
Free For All: It’s you against everyone else. Slay your way to victory.
Swat: No shields, no motion tracker. Aim for the head!
Weekend Playlist: A weekly playlist that features a mode voted on by the community via Halo Waypoint/Channel.
The weekend social playlist will features modes selected by the community, and offer bonus XP and REQ Points. Additionally, the most popular modes have the potential for becoming their own playlist.
In regards to BTB
http://www.ign.com/articles/2015/10/13/halo-5-to-get-custom-big-team-battle-maps
Halo 5: Guardians multiplayer designer Quinn DelHoyo shed more light on what would be done with Big Team Battle once it launches post-release. Speaking to IGN, he first confirmed that, yes, "Big Team Battle will have its own [matchmaking] playlist when it launches." We were speaking about the just-announced launch-day matchmaking playlists for Halo 5, so we asked DelHoyo which of the out-of-the-box maps would be a good fit for Big Team Battle. His answer surprised us: "We’re crafting all new maps that are designed from the ground up to cater to Big Team Battle," DelHoyo announced. "These will include a healthy mix of infantry and vehicular combat that Big Team Battle is known for."