The next event has been announced.
They're still reworking the evolver quests; this time to improve drop rate (hopefully guaranteed) and decrease difficulty, which likely means no more million HP Rainbow Dragon.
50-stamina Shiryu and McGuy are the new Coliseum characters; Lucky Roo, Coby, and Chaos Killer are the returning.
The new Law/Monet fortnight is going to be 1/2 stamina and looks to have Chopperman rewards. Time to socket AnniLaw and Monet.
Gran Tesoro, Young Robin and Nami, Lucci, Chin Jao Family, Rumbar, and Breed fortnights will also be 1/2 stamina. Tesoro has Diamante books while Chin Jao theoretically has Borsalino; the rest are mainly useful for sockets.
Rookie Support Quests are also half stamina if you need sockets for any of those characters.
Mihawk will be both 1/2 stamina and 2x rewards, which is something that I wish they'd do for the other raids.
The usual turtle times, 2x success, and skillups; the next 2x skill is right after the second run through for the movie batch.
Meat snail rate up but not until after the Movie Raids.