Holy shit, this is gonna suck balls!
First of all, has it been thirty moons already? If so, why the hell are they still in high school? I thought they were supposed to be seniors. What have the ponies been up to all this time?
So Sunset Shimmer is reformed. When did this happen? Seriously, in the previous movie she turned into the devil, turned a bunch of teenagers into zombies (I'm still not sure what she was trying to accomplish against the royal guard, not to mention these teens have no idea how to be ponies, but that's a whole different story altogether) and then she started crying only after she got blown up. How is that a reformation?
Then there's the diamond dog... man... bear... pig... things, but Spike's still a puppy. Speaking of Spike, what's his excuse to be there?
I'm not going to talk in-depth about this, it's gonna be terrible.