Well I have a candidate for WDYTYA - one of my brickwalls! So I have been looking and looking for a famous descendent which I could then offer as the "celebrity". Can't find one so I have no "carrot".
The story starts with my brickwall, her (at least) 3 partners/husbands, includes mythical link to Charles Dickens, possible scandalous link with an OZ NSW premier (in mid 1800s), arrests for murder (publican accused of supplying drinks to customer until he was dead), lively 1800s OZ pubs, religious problems, unorthodox wills, a judge, possible convict connections, couple of world war brave soldiers, British scum make good in OZ. I can also offer interviews with some of the still living descendents of the 3ggmother brick wall - all from different 3 ggfathers (we have managed to find eachother online some 160+ years later). Could be good - I can even imagine re-enactments!