The League of Extraordinary Gentlemen, Van Helsing, and Sky Captain and the World of Tomorrow should make a trilogy of sorts.
All three are cheesy action/adventure films that can be quite enjoyable if you watch them with the right attitude. The first two both take characters from classic literature and weave them into a story about Victorian-era secret agents — and both have rooftop battles with Mr. Hyde in Paris. Sky Captain uses tropes from the serials instead of actual characters, but again deals with semi-secret paramilitary organizations that have more advanced technology than the general public. And, like LXG, it finishes at a villain’s secret fortress in the Himalayas.