Game of Thrones Season 6 Spoilers
"Game of Thrones" Season 6 could feature some interesting flashbacks and the Northern Conspiracy. HBO

"Game of Thrones" is pretty much a year-round event. Much like how free agency keeps MLB, NBA and the NFL on fans' minds, "Game of Thrones" Season 6 casting news and rumors have continued to spark conversations and speculation over what to expect in the next chapter of HBO's hit series. While we may not know the fate of Jon Snow quite yet, here's what we do know about "Game of Thrones" Season 6.

Warning: "Game of Thrones" Season 6 spoilers and "A Song of Ice and Fire" discussion ahead.

We already know Euron Greyjoy, Oldtown and Bran Stark will be making appearances next season, but what about the other storylines? Daenerys will definitely return, as will Sansa Stark, Dorne and King's Landing. This includes the return of Jaime Lannister with Prince Trystane Martell. Tyrion will be busy ruling Meereen with Varys while Jorah and Daario will be trying to find Daenerys. As for Jon Snow and Castle Black, it seems likely that "Game of Thrones" Season 6 might feature a few scenes regarding that particular death, right?

Littlefinger and the Vale

You may have not noticed Yohn Royce too much in "Game of Thrones" Season 5, but he was the one belittling Lord Robyn's terrible swordplay. The actor who played Royce, Rupert Vansittart, said he was returning for a few Season 6 episodes of "Game of Thrones" in a recent interview. Considering we've only seen the Lord of Runestone at the Vale or conversing with Littlefinger, the tricky part is figuring out how he fits in next season.

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In George R.R. Martin's "A Song of Ice and Fire," Yohn Royce is a thorn in Littlefinger's side and formed the Lords Declarant. Royce wants to remove Littlefinger from power, but "Game of Thrones" has strayed far away from Littlefinger's "ASOIAF" storyline. Royce could continue to be a threat to Littlefinger, or he could be part of the plans to raise an army and attack the Boltons.

Rickon And The Northern Lords

Watchers on the Wall, a "Game of Thrones" and "A Song of Ice and Fire" fan community, has been quick to get all the "Game of Thrones" Season 6 casting news. They delivered a huge round of casting details that could point to the return of Rickon and plenty of Northern action. There's a casting call for a "Lord of Noble Northern House" and "Lord of Northern Stronghold." Based on the descriptions, many assume the former will be Lord Jon Umber, better known as the Greatjon, and the latter to be Lord Wyman Manderly. Way back in Season 3, we learned that Rickon and Osha were headed to Last Hearth and the Umbers. Greatjon was last seen in Season 1 and recasting the role makes sense.

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In "ASOIAF," Greatjon attends the Red Wedding and is kept as prisoner when we last see him in "A Storm of Swords."

Lord Manderly's potential casting is also interesting because of the changes made in "Game of Thrones" Season 5. In "A Dance with Dragons," Lord Manderly has been feasting at White Harbor, and Ser Davos is sent to the Merman's court to have him pledge loyalty to Stannis Baratheon. Wyman has Ser Davos taken as a prisoner and claims to pledge fealty to the Lannisters and Freys, but it's a ruse and is part of his larger plan to have his son, Ser Wyllis, returned to him as well as to pay back the Freys for the death of Ser Wendel Manderly during the Red Wedding.

During Ramsay's wedding, the three Freys who were at White Harbor are nowhere to be found, and Lord Manderly proves he's not an obese fool. He serves three pies, and we can all guess what meat that was used for this savory meal.

The Grand Northern Conspiracy, as it's known by readers, is the theory that Robb Stark legitimized Jon Snow, and all the Northern houses are working to make him King of the North. Plenty of northerners are working hard to have Stannis and the Boltons at war, which will deplete the army of the victor and lead to an easy victory for the North. That doesn't make a lot of sense now that Stannis is dead, but "Game of Thrones" Season 6 could tinker around with that storyline and have Sansa be the Stark that the Northern houses want in power.

Arthur Dayne, Really?

The casting call for a "Legendary Fighter" has everyone dreaming about the possibility of Ser Arthur Dayne. To put it mildly, Dayne may have been the best knights to ever live. His fighting skills definitely live up to the "legendary" moniker and the show is looking for "the best in Europe" for a week of fight scenes. There's also the famous sword that the knight is carrying.

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In terms of Valyrian Steel, we know Longclaw belongs to Jon Snow, while Brienne has Oathkeeper. The Tarlys have Heartsbane, and Ser Arthur Dayne has the distinction of carrying a sword forged from a meteorite. Dawn has a distinct look, and the sword is definitely "hugely famous," but it hasn't been seen since Dayne was killed at the Tower of Joy.

Based on previous casting news, flashbacks may not be uncommon in "Game of Thrones" Season 6. There's one that features a trio of boys -- possibly Robert Baratheon, Ned Stark and Howland Reed -- and there could be a flashback to Ser Arthur Dayne and the Tower of Joy as we learn more about the events that led to Robert's Rebellion. Bran has the ability to look into the past via weirwood trees, and there are a few locations in Spain that could fit the Tower of Joy. If that's the case, there could be some confirmation of the R+L = J theory.

Best of the Rest

A Red Priestess could be helping Varys and Tyrion run Meereen, based on a leaked audition video. The rest of the casting news points to some Riverland action and smaller roles.