Just finished a Crisis 2 with all crisis and villains solo.
Finished it in 85 cards from the main deck.
Solo I think Crisis Black Canary is broken.
Being able to get the villains right away into your deck without having to destroy them is very powerful in solo play.
Her downside would be in a game with more players. As villains with attacks would Attack your fellow team mates when played. And since she has no choice when attacking villains she can clog up her deck with nothing but Attack cards. So then it comes down to whether it's worth it for her to even defeat villains and if she does then it becomes a choice of using those cards.
I have to say that this crisis is much improved game and will become a favorite of my group very quickly.