What happened to all of the guilds on Blue, and what is Fuse?

[Wakanda]

People prob think this is a troll thread, but I'm actually curious what happen to all the guilds that were here like a year ago? I assume that Fuse stands for fusing all the guilds together? Because I see people I knew from Riot, Vanquish, Dawn Believers, Ex Astra and Kittens etc. in <Fuse> now, but I don't see any actual lore and am curious to know what happened.