It’s all about stories. We’ll be using several game systems to create and live out these stories. The game and its characters exist outside of timelines and specific rulesets. We will let timelines unfold contextually and organically, and every player is encouraged to populate the world with characters. Based on the way we play, even the legends and songs and stories will come out of play sessions.
Rulesets included (so far):

Microscope
Kingdom
Unbound
Goblin Quest
Becoming: A Game of Heroism and Sacrifice
Fiasco
Perseverant
Reflections: A Game of Dueling Samurai
Mythender
D&D 5e
D&D 3.5e (to tie up loose ends)