Unfortunately the Skeleton Reanimates do not appear when you drag them onto the map. They also don't show up in the Preview.
Undead now on the Scenario Builder! But....
I just updated and reposted my Army of Darkness Scenario. I think it's good but few people will have enough skeleton units (I have 2 copies of Heralds of Dreadfal and 1 of Terrors of the mist). so it probably won't get played much. Still it's a decent castle defense scenario. I will be playing your Cursed Ruins scenario at my next BL session. Once I post I'll post a Like for it. I look forward to seeing more maps from your Runebound Campaign.