Yes, Bomberman Wars is sort of the "prelude" to Bomberman World; the villains you face in Bomberman World have been trapped dormant in their crystals (you can guess how) for many years and are released, revived, and "upgraded" by Bagular. I thought Bomberman Wars was released in the U.S., though.... huh.

By the by, it was released for at least one other platform (PS) that I know of.