Vaenyr
Ancient Mariner
After a while I changed my mind regarding upcoming album "alchemy" theme. I agree with @TheMercenary in a sense that new album will be set more in sci-fi realm. The Mandrake Project does not sound overly medieval, also we know about Necropolis from If Eternity Should Fail. Album narrative may be seen more from aliens perspective. There is a theory that pyramids (Roy Z mentioned those) were built because of aliens. Also promo picture indeed does look like some sort of ancient hangar/space ships landing place. So, some dark form of aliens will kill indigenous people to obtain eternal life (here's mandrake for you). Album may sound Chemical Weddingish, but lyrically it will lean more towards dark sci-fi. Such is my prediction.
Thanks to IESF we've known for almost a decade that at least part of the album will be dark sci-fi. Knowing Bruce he will probably weave in some occult themes in there as well, but I'd assume the base will remain sci-fi.