Alright so the ways this episode can go down, for me that's what'll primarily make or break the episode:
1. Dawn catches Cresselia, which is great cause she's a super experienced trainer and coordinator, and think it'll be well deserved
2. Goh gets it cause...of course...
3. In a suprise twist, Chloe gets it, which I wont know how to process cause on one hand, while she has grown on me, at this point she's an even bigger noob than Goh, and her having Cresselia at this point would in the similar vane as Goh having Suicune, and I can't just be a hypocrite about the whole thing. On the other hand, unlike Goh, she isn't really stepping on any one else's toes, and wouldn't be. In fact I'd see her as similar that Nurse Joy with Latias, where she wouldn't be anything super grandiose.
4. No one gets either Darkrai or Cresselia, and I get on with my day