Call of Duty: Warzone started off as a Battle Royale, however, the other playlists managed to gain more popularity than the Battle Royale mode itself. The Plunder mode, for instance, is still one of the most played game modes, and it does add a nice little twist to the generic FPS multiplayer game modes we see.
One of the game modes introduced in Call of Duty: Warzone was Rumble. In Rumble, there were two teams of 50 players each battling out for the most number of skills. The game mode was launched a few months back, however, it was eventually removed despite being one of the most widely played playlists to make room for other game modes.
Last weekend, Rumble made a comeback into the game, and players were back into the chaotic action in no time. However, it has been removed, once again. This is due to the fact that it is usually one of the game modes that is in rotation, and it gets replaced by other games frequently.
Whether or not it makes a return once again remains to be seen. It took three months for Rumble to make a return, so expect a similar time frame next time around as well.