I skate for the Nashville Rollergirls, but all opinions are my own. Expect derby and lots of it. Possible musings as well. Donno.
Each season the derby community learns something new in both pack play and jamming. It starts around playoffs and champs*, with the top 15 teams showing us what they have been working on, and the rest of derby picking it up to work on next season.
It is to early to say for sure, but to me this year has been the year of trying to figure out how not to just PUSH as jammers, and in the pack it has been the re-emergence of positional pickups, and a demonstration of effective set offensive plays against different formations.
So far. :D
*you could argue there is an ECDX wave as well.
If I were to hazard a guess, I would say that next year will be jammers using height changes for wall breaking. I would guess that blockers will be rediscovering their shoulders (for positional play) and a further focus on blocking formations that morph based on the current stage of contact with the other team.
(Just a guess, but I have been right before.)