England, Ireland, Scotland and Wales make various unions together. Then dissolve them. 10 times. (They propose a few dozen more.)

Orion Jackson was on the winning side of Panem's dark war. The districts were revolting and were winning when a meteor happens to hit District 13, where people are saying that whoever holds it will win the war. In his world of gods Orion knows that can't be true, but is more than surprised when he finds out that the meteor wasn't a meteor. It was 9 kids. None of them from his time.

(a Percy Jackson, Harry Potter and Hunger Games crossover) All brought to the future where the world is on the verge of completely collapsing and an evil dormant force, asleep since before time and never known to exist, is finally awakening and taking away everything. Only together they will prevail and maybe not at all because what is awakening is pure evil...