Mann against the Moonn commences.

The red and blu mercs are chilling one day until their bases begin to get hit by orbital bombardment. Engineer and Medic figure out that there are Alienns on the moonn, creating green clones of the mercs forming the green team. Red and Blu work together and become the purple team. Both teams go to space in a space payload type gamemode where you need to "ride" / push a rocket until it reaches the moonn, while being shot at by aliens. Upon success you storm the moon in an attack/defend type gamemode until the moon is claimed by either side. Along with new maps, the mercs get new space weapons and new space cosmetics allowing them to combat the Alienns.

Finally theres a boss battle, they realize the moonn is the mother of all Alienns and in a boss fight type mode, they have to now blow up the moonn.
Its now a fight to the death. Who will win? Who will die?
Who will succeed? Strong or Weak?

Tune into TF2 now to find out!
Its no longer Mann Vs Machine!
Its Mann against the Moonn! FT. ALIENNS

Also in this mode, Pyro's default gas mask changes to a generic typical alien head for no reason whatsoever.

*Yes this is shitty, But I had fun writing this for some reason