Here is a big part of things that have been reported for season 6. I don't have everything so I would be very fortunate if anyone could a little more info.
I have done a post with this info back in October. If you remember, I did 4 weekly posts in October and November I'm doing this mostly to remind people to what we can see, at least what was confirmed by TWOTW (The Watchers On The Wall). Remember we are possibly days away from the trailer, being the most possible date Feb 14, HBO's new show (Vinyl) premiere.
WARNING!! This was confirmed by the site The Watchers On The Wall, if it happens to not being true, well then I was also caught in wrong informations, altough I believe in their sources.
CONFIRMED
There will be a scene with Kinvara, a red priestess that was summoned to Meereen by Varys and Tyrion.
Yohn Royce is returning.
The Dothrakis are coming.
A children of the forest has been cast so they will probably appear in Season 6.
The Northern Lords will appear and it will be SmallJon Umber and the new Lord Karstark..
We are going to see Oldtown.
We are going to meet the Tarlys.
There will be a Tarly family dinner that Sam is going to crash.
We are going to see more of the Ironborn, including Euron Greyjoy and Asha/Yara Greyjoy and the KINGSMOOT.
Tower Of Joy confirmed.
Theon is going to the Iron Islands.
There will be a flashback scene with Ned Stark at a young age.
Bran is back and will have some interesting visions.
The Freys are coming back including Walder Frey and probably Merret Frey.
Tormund is in Season 6.
Arya will be blind in some part of Season 6.
Arya will be in the water in Episode 7.
Nathalie (Missandei) teases that there will be new interactions in season 6.
Kingsmoot is happening.
The Tarly family will be played by James Faulkner(Father), Samantha Spiro(Mother), Rebecca Benson(Sister) and Freddie Stroma(Brother)
Arya will be chased by The Waif.
Pilou Asbaek will be Euron Greyjoy.
According to what Finn Jones (Loras) said, the last episode of the season is very shocking.
500 extras planned for big scene in Girona (KL or Bravoos) .
Areo Hotah will be in this season but no indication of Doran Martell.
Hodor is back !
There will be a flashback scene for Hodor's origin.
Mace and Olenna will share a scene together.
Jaime will try to save Margaery from the High Sparrow's claws, but the High Sparrow will give without anything in return because she has been turned in a devotee to the Faith of the Seven and it's feature in episode 6.
There will be a big battle in the North that supposedly will feature The Umbers, the wildlings, The Boltons and more suprisingly, JON SNOW.
The Mercy Chapter in TWOW sample chapters is going to appear but not in the same way, Arya will be watching the show instead of appearing in it, at least that'S what they are saying.
The actors are casted for the Bravoosi theatrical troupe and in between them is Richard Grant, Essie Davis, Eva Butterfly, Kevin Eldon and Leigh Gill.
There will be a scene featuring Sam speaking to a Maester in Oldtown.
The Tyrell army was spotted in KL.
Details in Arya's clothes reveal that they will be wet and bloody in episode 7, but DONT WORRY, there also details about episode 8 so she'll live.
According to Gwendoline Christie (Brienne) she will have a 'thuggish' fight in season 6.
Kit Harrigton let it slip that we would be up with GOT, until his thirties, on time for SEASON 8! #jonsnowlives
Jaime and Mace will have a talk in season 6, probably not very long.
Jon Snow has been spotted in a picture wearing Stark armour.
The Stark, Hornwood and Mormont banners have been spotted at the big north battle set.
That battle is reported to feature fog and smoke.
Bran & Bloodraven will be in the Tower of Joy flashback.
Actors Luke Roberts, Eddie Eyre & Robert Aramayo will be at the ToJ, and they will probably represent young Ned, Arthur and Howland.
A facebook video surfaced that has been deleted, but has since been posted(ofc) on youtube
Lannisters tents were put just outside Riverrun. Rumors of a siege or takeover.
Euron is pronounced 'your-on'
An audition has leaked that indicates that Dosh Khaleen will be a part of Dany's storyline.
Joe Naufahu has been casted, and he fits as the Dothraki character but still with no confirmation., It will be a multi-episode arc character.
Daario has been spotted, but suprisingly, there was a leaked photo of Daario with Dany but no sight of Jorah, in which his case only the actor was spotted, and Missandei is there too.
There has been a casting call for a Lord in his 50s. "Best remaining part this season"
There is an image of Varys and Tyrion in Costume in MEEREEN.
Melanie Lidburd has been cast as a red priestess in Meereen.
New Story spoilers regarding Tyrion and Varys.
Cersei has been spotted in a scene for the first time!
Kit and Iain were spotted.
New pictures of the set that will most likely be RIVERRUN!
Shae has been spotted in costume! She will probably feature in an allucination or flashback for Tyrion.
Meereen's story has become a little more clearer.
RUMOURED
Jon's funeral was supposedly filmed but there was no 100% confirmation.
A Currupted BWB might be appearing.
Cleganebowl might happen because Rory Mcann (The Hound) has been seen in Belfast. GET F*CKIN HYPE
Arya might go to the Riverlands.
Jaime might go to the Riverlands.
There will be a White Walker scene that will make Hardhome look like child's play.
Septon Meribald’s appearance.
Sophie Turner was seen near the Winterfell set that may be Winterfell or another castle.
Sansa is poised to have her biggest season yet.
Littlefinger may return to the North with an army from the Vale.
Sand Snakes might return.
Osha and Rickon might return.
Aeron and Victarion Greyjoy might be appearing.
Arthur Dayne might appear due to some casting rumors.
Sources: TheWatchersOnTheWall and Wic.net posts!
Cheers
TL;DR A lot of crazy shit happens.