50: Every franchise will eventually have a crossover
with every other franchise in some form. In other words, if it hasn't happened yet, someone's probably working on it now.
This trope includes any type of contact between franchises, whether it be physical or merely conceptual. See the image, which combines My Little Pony: Friendship Is Magic
with Doctor Who
, two franchises with very
different atmospheres, in a single piece of artwork.
The resulting crossover may be art
. It may be a delightful surprise, like finding out how well chocolate and peanut butter go together, or it may turn your stomach.
This can apply to a Common Crossover
, Mega Crossover
, or even a Massive Multiplayer Crossover
but not a Crisis Crossover
which features characters from the same universe.
Note that Rule 34
refers to prurient versions of single franchises, while Crossover Ship
refers to romantic crossovers only.