@Scrounge  
While it might not have been “even worse than she was treating them”, I’d just like to say I called the general gist of it.

It all makes no sense. Twilight has been PC’s personal student for at least 10 years, more like 14-16. I thought Sunset was some kind of energy Vampire, nomming on ignorant humans while brainwashing them into forgetting that she should be a grownup and get a job already.

Probably closer to five years, actually, if the portal opens once every 30 months; I’m fairly certain Shimmer’s been gone a full 60 months

@Background Human  
I’m pretty sure she will be a little bit more friendlier after that incident. Twilight might not trust her with the crown.

@Scrounge  
She could always crash at Sunset Shimmer’s place….

@SeraphimDawn
 
True that. Can’t sleep in the school library forever.

@Scrounge  
Twilight was also in a hurry to get home. Otherwise she would’ve had to stay in the wreck of a human world for another couple years.

@SeraphimDawn  
That’s exactly my point. Twilight didn’t think about what would happen. If she had, she would have insisted that Sunset Shimmer come home.
 
Not that I can blame her for just wanting to go home and not think about any of that again ever.

@Scrounge  
At least in Equestria few know her to even have any reasons to hate her. The Mane 6 ponies didn’t even know her until Celestia told them about her.  
The people in Canterlot High know her very well, and they have all the reasons to wail in on her.

Yeah, I think Twilight should have brought Sunset Shimmer home to reunite with Celestia, make her apologies, etc.
 
Because after the crap she pulled, I think her classmates at Canterlot High are going to treat her even worse than she was treating them.

I’d say she’d return as soon as she could when the portal reopened.

@Trickquestion  
They could’ve had her come back and tell everyone how terrible it was to go without magic while all the non-unicorn characters roll their eyes and Twilight is nearly brought to tears.

@Background Pony  
Twilight was still a filly when she was accepted by Celestia. A similar scenario might have taken place when Celestia recognized Sunset’s magic talent. But, she like a failed experiment.
 
Sort of like how both Planet Earth and Planet Venus are planets of similar size, with similar geological beginnings, but turned out different from each other.

@supermanhulkjesus  
You kidding me? That’s probably why her character is so awful and stupid-Living without her magic has made her batshit insane! That would have been cool as an actual plot point.

@Trickquestion  
Considering she’s already been there for a few years voluntarily, I think she’ll be fine.

You know, in retrospect, having someone so immersed in magic being left in a world utterly without magic is a pretty harsh punishment. It’s be like taking away a sense, or a limb.
 
Well, now Sunset has to go on a confusing adventure to re-connect to magic, with a mysterious old woman who lies a lot and a psychotic ex-military smuggler!

Longer than two years, Sunset Shimmer was Celestia’s student before Twilight, that was a good 10 years ago

People gotta learn to pay attention. Its 30 Moons until the next opening. If pony years work the same, its gunna be at most 2 1/2 years.

@Star Cavalcade  
If “Who cares, friendship solves everything” was good enough for Discord, it’s certainly good enough for Sunset Shimmer.

Thing is the human world, for ill for good is her home now. I’m sure she would have asked to return if she wanted, if not she can after a couple of years. (Assuming a “moon” is a month like in some cultures.)

@441TheSecond  
You’re a brony, you can’t be slim and sexy. You have to be a fat neckbeard.

@Background Human  
No, though Flash was also pretty bad, at least he had no potential from the start, at least he didn’t suck out the fun out of my slim, sexy body every second he was on-screen.

@Trickquestion  
And then she just happens to bump into Twilight, knocking her crown off. They both stare at it for a few seconds before Sunset grabs it and bolts.
 
Or something like that.

@Trickquestion  
Yeah, considering how the portal is only open every 30 moons, it kinda makes it hard to plan for things in advance.

@Star Cavalcade  
Another question: How does she even know where the Element of Magic is? I’ll concede her knowing they exist, seeing as she presumably had the same resources as Twilight, but for all she knows it’s still in that bloody castle!
 
…
 
Actually, that would have been really funny. See her come through the portal, cackle evilly about her plans, then time cut to her getting off a train, looking dirty and ragged, going “Well that turned out to be a complete waste of my time!”