there are only 2 things that are 100% guaranteed:
a patched together patch (lol) to try and buy time to work on WoD since they have no real content to give players subs will drop as im sure they already are.
But honestly what does any new pvp season bring...the same shit... just saying
You might get new gear art
Increased Ilv and stats... maybe some more class tweaks.... same as always
"I'm Tru @ w/e I do" ~ TM
The only thing you should expect is another gear grind to keep you busy for a few months until the next expac comes out.
They should buff bladestorm so I can yolo 5 warriors to 2200 in 5s like my mate did this season. Seriously if 5 of the same class can get glad rankings you're doing it wrong.
i wouldnt expect anything sweeping. seeing as how its the last season of the expansion and im sure theyll be focusing on doing a bunch of retweaking and balancing for WoD it doesnt seem like it make a whole lot of logical sense to spend a hefty amount of time worrying about anything other than drastic changes needed.
More of the same. Possibly different classes holding the most mongoloid damage potential, depending on how gear scaling works out.
I serously doubt the devs will finally revisit dks dd specs and balance them in pvp. They didn't for a whole xpack and won't now and this includes even the sacred PvE, not just PvP. The hole in dk design is so big, that only a complete lock revamp could ever hope to fix it.
it might be much easier to balance specs such as rets and spriests by adjusting some numbers.
Another boring and pointless gear grind, likely nothing else.