10. Arya Won't Personally Cross Off Any More Names...
Arya's been reciting her 'kill list' - the names of all the characters she wants to kill - ever since Season 2. That's a long time to hold a grudge, and now that she's back in Westeros she could start checking off a few more names.
So far, those to have met the God of Death are: Polliver, Rorge, Joffrey Baratheon, Tywin Lannister, Meryn Trant, and Walder Frey, while the Hound was believed dead, and Arya no longer includes him on her list anyway.
That leaves Cersei Lannister, the Mountain, Ilyn Payne, Melisandre, Beric Dondarrion, and Thoros of Myr. It's unlikely Ilyn will return, even if Wilko Johnson has thankfully recovered from cancer. Beric and Thoros will be fighting Beyond-the-Wall alongside Jon, meaning Arya won't get a chance to kill them, while Melisandre is at Dragonstone, so again should be spared.
That leaves Cersei and the Mountain. It's unclear if the Mountain can even be killed, but if so it seems unlikely Arya - who'll mostly be in the North - will be the one to do it. Geography plays a part for Cersei too, but really it's just much more fitting if Jaime is the one to kill her, and more likely in terms of where their respective stories are headed. Arya may still be able to tick a few names off - they're all at risk - but she won't personally be delivering the fatal blow.
9. ...But She Will Be Reunited With Her Family...
One of the main reasons that it's difficult to see Arya crossing off any names is the path her character is on. After returning to Westeros last year, she did admittedly cross off a name as her first task, but it's part of her homecoming. Arya is almost certainly going back to Winterfell.
The reunion between Sansa and Jon - who weren't ever close - in Season 6 was an incredibly poignant moment. Arya reuniting with her siblings promises to be even more so. Arya has travelled so far that going home is the most logical point for her character now (after all, she literally tells Jaqen that she's "going home"), while we also know Bran is en route back to Winterfell too.
That means we're getting a big Stark reunion at some point. In true Thrones fashion it probably won't be everything we want - there's a good chance Arya will get there when Jon's absent, denying us the most desired reunion of the bunch - but the three who are actually siblings will meet again.
There should be at least one more reunion for Arya too. While Gendry returning is the worst kept secret of Season 7, that pair could well be kept apart from a time, but what should be nailed on is a reunion with Nymeria, Arya's direwolf. The show needs to tie up some of those plot points, and Nymeria is still out there, while the shots in the trailer - of Arya looking very cold and alone - make for a perfect entrance for her old friend. Throw in a Hot Pie cameo too and you've got a merry season for Arya, who deserves a little bit of happiness.