In the third episode of Game of Thrones” season 7, the long time speculation that House Tarly will turn against House Tyrell has been confirmed. With the fall of the Tyrells and the decimation of its main line, there is no one left to lay claim as the rightful heir to the seat of Highgarden.

As promised by Jamie Lannister, Queen Cersie will reward Lord Tarly by giving him the titles, Lord of Highgarden, Lord Paramount of the Reach and Warden of the South. As a result of his loyalty to the Crown, Randyll Tarly’s House rises as the most powerful family in the Reach.

This development may affect Samwell Tarly's future should series of unfortunate events occur.

Death of Randyll and Dickon Tarly

Queen Cersei may have won several battles during the initial stages, but she has not won the war yet. Daenerys Targaryen still has to unleash her fearless Dothraki horde and her formidable dragons against the Westerosi armies, who have never face such enemies in their lifetime before.

Randyll Tarly himself made mention of the dragons during an audience with Cersei at the Iron Throne and asked how the Queen plans to defeat them. We know Cersei and Qyburn had the idea, and it’s a good one.

Also, this is “Game of Thrones, ” and Lord Tarly’s statement likely portends of what’s going to happen to him and his son.

It’s similar to watching the opening, “previously on Game of Thrones.” It is plausible that both Randyll and Dickon Tarly will meet their demise at the raging fire of Daenerys’ dragon leaving Sam, the rightful heir to the title and seat of Hornhill.

The end of the brotherhood of the Night’s Watch

Hold your knives before you howl, traitor!

Yes, Sam is a sworn brother of the Night’s Watch, and he took a solemn oath to forsake all lands, titles, and lordship. Not to mention that he will put Jon Snow, the King of the North, in an awkward situation if he becomes a deserter. You know, the whole business about the man who passes sentence, swings the sword thing.

One popular theory posted on Reddit offered the possibility that the brotherhood could be dissolved in the ASOIF 6th book, The Winds of Winter.

If this happens, it is very likely that Sam and other surviving members will be released from their oath.

Winter is already in Westeros and the coming of White Walkers it is only a matter time. The Night King could bring down the wall and decimate almost all of the members of the brotherhood. If Jon and his allies win, the Night’s Watch loses its purpose and could cease to exist.

Also, if you are having doubts about Sam’s chances of surviving the White Walkers, remember he encountered and survived the dead at the Fist of the First Men during season 2 of “Game of Thrones.

Sam will not become a maester

As events are rapidly unfolding in Westeros and Sam is confined to gross and menial jobs at the Citadel, it won’t be long before he leaves Old Town along with Gilly and little Sam.

It is possible that one of the reasons, which would make him decide to hastily leave the Citadel, is finding valuable pieces of information on how to defeat the White Walkers. Remember, as punishment for treating Jorah; he was ordered by Archmaester Marwyn to copy those old scrolls infested by flesh-eating mites?

Also, it is possible that the news of the death of his father and brother could make Sam leave to be with his mother and sister.

Sam as Lord of Hornhill and Warden of the South

In "Game of Thrones" season 6, Sam stole his family’s symbol of authority, the Valyrian sword, Heartsbane, before leaving Hornhill. This again reinforces the fact that Sam is the rightful heir to his father’s title and portends the eventuality that he will get it one day.

If Daenerys or Jon successfully defeats Cersei and take the Iron Throne, Sam could end up not only as the Lord of Hornhill. In light of the demise of House Tyrell, he could be proclaimed the Lord Paramount of the Reach and the Warden of the South.