I wrote up some lists and scenarios for Weird WW1 using the Chaos in Carpathia/Cairo rules. In a month or so they should be up on the web as a free download if they don't get expanded into a proper book. The basic premise is a unit releiving a section of the line excavates a caved-in dugout only to discover that it was purposely caved-in...and for a good reason! I wrote 3-4 linked scenarios based around discovering the vampire, finding out how to deal with him, and the final showdown.
I have provisional plans to write more scenarios based around a patrol getting lost in the Ardennes and stumbling into a strange village with wolf problems and a strongpoint in the verdun sector where recent casualties have risen to rejoin the fray. You could also have troops in Palestine stumbling across biblical relics.
Of course with a baby and a rabbit infestation endangering my garden my plans can be easily sidetracked.