I know that the movie Batman Begins [2005] was made many years after the movies Batman, Batman Returns, Batman Forever, and Batman and Robin. 

If Batman Begins is in the same timeline as the other movies it must be set in a year before all the other movies in the series! However after seeing all the movies I think it is based in a year much later than the other movies.

So is Batman Begins in the same timeline as the previous Batman movies?