At this point, my hopes for Krystal getting in the game rest solely on DLC. I think she's got a decent shot if that happens. Unfortunately, depending on who gets into the initial game, I think she may have to take a back seat behind other characters. Provided that these characters don't make it and are considered for DLC, I think she'd probably be behind:
Mewtwo - He was the most requested character in Japan when the roster was decided (see ChronoBound's findings on the Japanese fanbase), he is very iconic, he is still relevant to Pokemon, and he has a unique moveset already made.
Roy - Like Mewtwo, he was greatly requested in Japan when the roster was decided. He is also easy to clone from Marth.
Lucas - I feel he would have priority as DLC. Also, he would easy to create because he is a semi-clone.
King K. Rool - He is very popular worldwide, and has lots of appeal and moveset potential.
Dixie Kong - She may not be as requested as K. Rool, but she still stands out in popularity and Sakurai could easily use Diddy's body type as a base to create her.
However, regardless of those characters, I think that Krystal can still make it in as DLC. She definitely has unique moveset potential, and I think she still has a fanbase despite how vocal her haters are. If Starfox gets another character, I'm pretty sure she is next in line (most of you can probably agree with me on this). I can see around 6-8 DLC characters if we get a 47 character roster, and Krystal could definitely be one of them.
That being said, I'm taking a similar stance on Krystal that I had with Rosalina before she was confirmed. I do support Krystal, but I don't expect her. I feel that's the safest approach.