Hi deadlydornishsandsnake! I’m not sure which gifset you’re talking about (the closest thing I am aware of is this pretty graphic) but I don’t think that Arya and Sansa have revenge in their future. The books are very much against revenge (look at what happened to Oberyn). I think that the future of the Stark children is going to be about reconciliation, forgiveness, rebuilding, etc as they try to pick up the shattered pieces of their lives in Winterfell.
donewithwoodenteeth wrote an interesting piece here about how Arya and Oberyn don’t currently have a lot in common and I think that’s true. Sansa doesn’t have a whole lot in common with Doran right now either; she’s currently the hostage of a sexual predator with almost no agency.
That being said, I still think it’s fun to speculate about the Starks’ future. Obviously a gifset isn’t foreshadowing for future books (the show and the books are entirely separate), but, if you’ll allow me to rephrase your question, could Sansa & Arya have parallels with Doran & Oberyn in the future? To which I would answer, maaaybe? They’re both still children right now, so their futures can go in a lot of different directions.
If you look through my #endgame tag, you can see that I think Rickon will be King in the North in the end, and Sansa and Arya will (eventually, as they grow up) have auxiliary roles in Rickon’s court, where there will still be major players like Wyman Manderly or whoever else survives.
Many people argue that Sansa’s storyline will have some sort of political payoff and that she’ll have learned something about the use of “soft power” and manipulation. At the very least, she would probably have a certain degree of influence with Rickon because they’re family. So yeah, I can see adult Sansa as a behind-the-scenes manipulator, someone who is dismissed too easily and uses that to her advantage, as Doran does. I tend to lean toward thinking that Sansa won’t have any “official” title in Rickon’s court, but I think she will be an important part of it nonetheless.
And one of the things I see in Arya is that she always wants to protect the people around her, “her pack” / her family. I easily see Arya’s desire to protect people staying with her into adulthood, maybe eventually as the lady commander of Rickon’s Kingsguard, with a place on Rickon’s small council. (“Can I be a king’s councillor and build castles” —AGOT. Winterfell certainly does need rebuilding.) I think that Arya would have more parallels with Dacey Mormont here (minus the dying part ofc), but the commander of a kingsguard has to be someone who is known to be dangerous by definition.
But if you’re just talking about one sibling being a known danger vs the other sibling being a subtle / easily dismissed and unrecognized danger, then yeah, I can see that applying to Arya and Sansa in the future. I think they’ll be working together to support Rickon and House Stark and The North.