I know this is an old post but I think about War of Magic all the time. It is the only game that is an RPG with a Total War like dynastic system. (Wildermyth doesn't count cause you have no control over what you children look like/ what class they are/ what color they are I had a black kid from 2 white parents....)
At least sell it again via digital or on gog..
Agreed. As a minimum stick it on GoG, or as a maximum go ahead with the whole engine upgrade and release the WoM ultimate edition idea posted earlier.
I also still think it would be really good if after the above you guys then re-unified the series under one name (eg Elemental franchise) as then you can advertise all the games (WoM, FE, LH, SK) as a package on steam/gog and people who own one of the games can try out one of the others in the series that they may not have known about or had access too. You've already pretty much done this on the Elemental website so you may as well on the storefronts too.
Steam franchise package examples:
Age of Wonders series