A gametype with both objective and slayer gametypes would be cool beans. Just as long as there is no headhunter or broslayer. The playlist could be 5v5 or 4v4. This seems feasible. The probability of this happening is less than likely though.
I’ve got a feeling Squad Slayer is going to get this and turn into Squad Battle like in Halo 3. 5v5 Slayer/objective. There isn’t really a need for 2 Slayer-only playlists especially if it’s only 2 players more.