Below you can find the upcoming playlists rotating in and out of Halo 5 (taken from Waypoint).
September
- September 2nd – Fall 2021 Arena Season begins
- September 2nd – Ranked Mythic Arena rotates in for Ranked Snipers for the month
- September 2nd – Rock ‘n’ Rail rotates in for Covenant Slayer
- September 9th – Roaming King rotates in for Rock ‘n’ Rail
- September 16th – ODST Slayer rotates in for Roaming King
- September 16th – Warzone Assault goes live for the weekend
- September 23rd – Grifball rotates in for ODST Slayer
- September 30th – Community Slayer rotates in for Grifball
- September 30th – Warzone Turbo goes live for the weekend
October
- October 7th – Ranked Free-for-All rotates in for Ranked Mythic Arena for the month
- October 7th – Action Sack rotates in for Community Slayer
- October 14th – CE Anniversary Throwback rotates in for Action Sack
- October 14th – Warzone Assault goes live for the weekend
- October 21st – Rock ‘n’ Rail rotates in for CE Anniversary Throwback
- October 28th – Castle Wars rotates in for Rock ‘n’ Rail
- October 28th – Warzone Turbo goes live for the weekend
