How do you know your request was granted if you don't sail until April?
When I was on the Treasure earlier this month, we went from Coco to 1923, then to Worlds of Marvel. I would guess it would be the same order for you.
I am sorry I misspoke.
I do not know through Disney.
Forgive me.

It will be granted through the head server we have had.
He was nice enough to give me his e-mail and he makes things happen for us.
He was one of the main head servers on the Treasure and was one of the people you talk to when first boarding
if you needed to change something in your dining.
So he knows how to arrange things for us and is a position where he does make it happen.
We just got off the Treasure the 15th of this month and he assured us he will make it happen.
Our sail date with our friends in March 29.
I am sure you are correct on the rotation. I cannot remember ours.
I just look at the app to see where we were going to be for the night and check out the menu!!!
I really don't pay attention to our rotation as I don't care.
However our friends want Coco 3 times because it is a new venue and this will be their first (and maybe only) time
they will get to try it out. He is handicapped and it is hard for them to get around.
They are Pearl cruisers (like us) so they want the newest dining venue as much as possible.