Roaring Revolution

Roaring Revolution is the ???th world in Plants vs. Zombies 2. It was revealed through a trailer, then through its teaser parties alongside the trailer. Plumbust is the gemium plant of First Revolution. The world takes place in 1844.

Main Gimmick
The main gimmick of the world is smog. Smog is fairly see-through, allowing the player to see what is going on behind it. However, the smog slowly suffocates plants caught in it, eventually choking them. Fairy Candles can cut through the smog, however after 30 seconds of being in the smog the Fairy Candles stop functioning, however they themselves cannot be killed by smog. Smog slowly advances throughout the level, but can be sent back 3 columns by Blovers. Certain zombies can also advance the smog. The surprise attack of the world is "Railway Mania!", where two or more Zombie Trains appear on screen and spawn zombies almost immediately.

The Brain Buster for the world is Mind the Fumes.

Game description
It's 1844, the height of the industrial revolution! The zombies are coming, and so is the smog! Do you like trains enough to stop the zombie rush at quittin' time?

Trivia

 * Railway Mania was an actual event during the Industrial Revolution.
 * In the 1840s, railways were being built en masse, with the inevitable fallout and chaos. This was called Railway Mania.
 * The use of the word sans is not an Undertale reference.
 * Sans means without.
 * This is the first world to have two Gargantuars.
 * It is, however, not the first world to have two zombie trios. The first was Big Wave Beach, with the Pompadour and Bikini Zombies.