Of Marvel titles I would like to see a movie based on Marvel's "Mighty Thor" comics as well as films about Iron Man and Captain America IF done properly. Or just put them all in one movie and call it the Avengers (though it might cause confusion with the movie starring Uma Thurman and Ralph Fiennes that was based on the old TV show that came out a while back).
I saw "Constantine" earlier today and thought it okay though at times coming off as a supernatural version of the Matrix (is it me or has the Matrix franchise lost its cool factor?)