@Wonderbrezzy: Justice League is set to come out by 2016. Lynn Collins will turn 40 that year. If a Wonder Woman solo comes after, she will be 42-44. In Justice League 2, she's be 44-46. In Wonder Woman 2, she'll be 46-48. So, no.
Lynn Collins is too old. Especially since she is 9 years older than Cavill.
Gemma Arterton for the win.