Map variants sounds like a very fun and great idea, adding new elements to maps and gameplay content without having to make new maps from scratch.
The most important thing that any map adaptation should do is make different feeding routes.
Refueling Tower holds Krakens instead of Goliaths in the cages, conducting electricity from the tower directly underground where it mets up with the water resevoir. Causing periodic electrical surges all the way down the river, the electrical surge can also be triggered by either monsters or hunters by doing damage to the caged Kraken.
Due to melting ice-shets some of the lower areas have flooded, causing a population spike amongst the tyrants and interbreeding causes them to have genetic defects like lower health or slower movement in some Tyrants. The Tyrants run rampant arcross the map and have eaten most of the smaller animals on the map.
The map is more sunny
Has water up near the beach and the lower areas
NO FREAKING BLIZZARD
Pros and cons
The tyrants will make it so that hunters have to be more warry of traveling alone
Meanwhile the lower spawn rate of prey will make evolving a lot tougher for the monster.
Generations after a toxic radiation and chemicals has taken a toll on the wildlife and the forest, while the forest is on it’s path to recovery the same can’t be said for the fauna however which have been largely killed off and those that manage to survive suffer from horrible and disgusting mutations.
Slightly different Fauna
Certain areas have plants that have toxic gasses that can harm both hunters and monsters if they stay too long near them.