You can't always follow trends. BW/XY was essentially the same game from what SM is trying to do. We have nerfed versions of the cards like Lysandre, N and Professor Juniper/Sycamore. No one really knows what the actual rotation will be but with a harsh change of game design from one set (two if you count Evolutions) to Sun and Moon is quite telling.
They could rotate up to Break and it will most likely happen but nothing much about the game changes. We still have N and Professor Sycamore in the format, which were printed in Fates and Steam, which is why I like the idea of Evolutions-On because it remove N and Professor Sycamore from the game, as well as overpowered decks like Greninja BREAK (Greninja is broken).
The could tell us one of many things and they are;
- No Rotation (Standard)
- Break-On
- Generations/Fates-On
- Evolutions-On (which offers the most balance)
- Sun and Moon-On
Less likely to happen
- BW-On (Japans format)
- Discontinue the Expanded format
- No Rotation (Expanded)
This is a lot of things, though less likely that could happen. We know one thing for sure though. The game is embracing a ban list now and S/M changed the game.