So, i've seen a few over the past week. Rose in FO Uniform, a FO Executioner Stormtrooper, the Crait Skimmer pilot, an a-wing pilot, and a new Rey in her outfit that she was in at the end of the Force Awakens.
75197 - $14.99
75200 - $24.99
75201 - $59.99
75202 - $79.99
From what I gather there are 3 microfighters - Chewbacca piloting the Falcon, a FO Tie Fighter with FO tie pilot, and (rumored A-wing with the pilot that was recently leaked)
We know that the Jawa/Tusken Raider/Droid battle pack is 1 of the 2 on January 1st, and the second battle pack is something from the Last Jedi. So that's one of the 4 sets.
The rey figure is more than likely paired with Luke in the 75200 set which is based on Ach-to... or at least thats what is rumored, although it could be a bigger set like Battle on Takodana, Battle of Geonosis, Scarif Bunker Battle, and the Unkar Plutt Jakku set. Those are commonly released in the winter wave.
There's the rumored Crait skimmer and that figure has been leaked. That might be the 79.99 set... but i'm not sure.
Then there's the mystery set... Clearly a good leak should hit soon. The other set that is supposed to be released on January 1st is the General Grievous fighter set that also comes with Mace Windu.
The Yoda Hut, and Jedi and Clone battle pack is rumored to hit with the 5 set Han Solo wave on 4/20. That wave also has a battle pack for the Han Solo movie. Who knows if there will be a summer wave or if the Han Solo movie is part of the official "summer wave".