Do you remember Dieter Hartmann-Wirthwein? He built that amazing little 125cc inline 4 Monkey bike. I guess Dieter isn't the kind of guy who sits around all satisfied with himself, he figured he could do something even better so he's busy working on another project, an 868cc Ducati V8, he calls it Ducati-Elenore.
This is still very much a work in progress, you can see from the photos the heads and valvetrain need quite a bit of work but the pistons seem to be situated in their respective cylinders so he's at least part way there. He's obviously a man of few words because there's very little information on his website. If my translation is correct, it will be a 2 valve
desmo (No desmo, same as 125, Thanks, Hugo) with valves of 27mm and 23mm, the cylinders have a 56mm bore and 43mm stroke.
I'm going to keep my eye on this one, I'm looking forward to the video.
Thanks for the tip, Andrew!
More photos below: