After two weeks of big, blockbuster trailers, the theme for this week seems to be smaller movies we didn’t know existed until this week.  Add “Limitless” to that list.  Bradley Cooper stars as an author who starts taking a drug that unlocks the full potential of his mind, letting him finish his latest book in four days, dominate the stock market and more.  Robert De Niro co-stars as a shadowy businessman who wants to know Cooper’s secret and it kind of seems like if “A Beautiful Mind” was a thriller.  Seems kind of interesting but I don’t think any of us are going to be lining up to see it.  Decide for yourself by checking out the trailer below and the movie is out sometime next year.