This new horror movie entitled Van Helsing will air in theaters May 7th, 2004. It was supposed to be show around the time when The Mummy aired in theaters but the project got too expensive an was postponed until summer 2004.
Mission Impossible 3 and Warner Brother's Troy will also be in theaters at around the same time as Van Helsing.
As you have already guessed Van Helsing will feature the characters Frankenstein, Dracula and the WolfMan. Van Helsing, a moster hunter, is played by Hugh Jackman (he also played Wolverine in X-Men 2). Another familiar actor from a recent movie is Kate Beckinsale, who plays a vampire hunters this time (she played the werewolf hunter Selina in Underworld).
I have heard that the movie will be packed with a lots of CG, special effect and a pretty good story.