Yeah, neither is on the Ms. Marvel CBM facast, iirc. Definitely not Ruth. And The Daily Mail doesn't source CBM anyway.
Regardless, they're both really good actresses, I have no doubt that they could make great Ms. Marvels.It's said we're still distracted by things like hair color. I doubt that, if If Ms. Marvel is going to be in Avengers 2, that they would introduce her in Avengers 2. I could be wrong, but every inclination of storytelling I have screams that there's not enough time to introduce brand new powered characters in an Avengers film.
And if they were going to include Ms. Marvel in Ant-Man, Cap or the SHIELD TV Show, we should very well start expecting them to be casting her in the next couple months. Especially if they need the directors of Cap and/or Ant-Man and/or SHIELD to weigh in on the choice, depending on how much they'll need to work with her.
This is a good rumor, I hope they end up going this direction, and I think it'll work much better in the long run, whereas Wasp would have been cumbersome.