Should they bring Captain Jack Harkness and Jenny back with the new Doctor?

Hell yes

There is a rumor that Jack will be back in Series 7! Hopefully it's true..

Yes it'd be interesting to have them make an appearance.

Captain Jack yes!

I soo love the eleventh doctor and everything new series have already brought us.. captain Jack is the only thing missing!

Bring Jenny back with be a very good idea, but if she regenerate into someone else, that is going to be a hell good surprise for the eleventh Doctor, it will be like the first time the Doctor met River Song, discovering who she is as she already know him.
I'm not so sure about Captain Jake Hackness, I mean we already know that he will become the face of Boe (that was hell of a surprise for me).