The Tower of Darkness playset did not make it to retail shelves. It would have been a fascinating playset with many intriguing features. Above you see a photo from the 1986 Toy Fair catalog. Below I will reproduce the description as it appears in the catalog:
NOT A NICE PLACE TO VISIT
Heroes beware...the most diabolical and deadly den of doom is waiting for you... DARKSEID's TOWER OF DARKNESS! A featured part of the SUPER POWERS programming, DARKSEID's home is designed to trap and torture even the most powerful of the SUPER POWERS. The Omega Eyes warn heroes of the multiple dangers:
DARKSEID, sitting on his mighty rock throne, watches with delight as our heroes are tormented.Will the SUPER POWERS escape DARKSEID's clutches? Kids everywhere will have great fun as they decide. Action figures sold separately. Assembly required. Ages 4 and up.
Given the information above, collectors know for a fact that two examples of this playset were produced. By drawing on informational photographs printed in Tomart's Action Figure Digest it becomes apparent that at least three prototypes were produced. The playset shown in an early issue of Tomart's and reshown later in issues is noticeably different from the two examples discussed earlier. The face paint of the Darkseid head is noticeably lacking on this piece. I am of the opinion that this playset is actually a first shot prototype meaning it was made from steel molds. I draw on my experience with distinguishing hand painted pieces from production painted pieces to make this conclusion. Both the gray and purple areas of the Tomarts Tower of Darkness appear cast in those colors as opposed to being handpainted. Although I have not viewed this piece in person, after studying the photographs at length and being armed with knowledge that unpainted first shot heads like the one seen here exist, it seems like an extremely plausible and probable assumption to make.
I am uncertain of the whereabout at this time of the Tower of Darkness shown in Tomart's, but we know for sure it is one of the examples that exist today. The prototype used for the cardback photo was thankfully saved and preserved as well. This example is handpainted and cast in a milky white protomolded material, which likely came from low yield aluminum molds. The existence of one other example of the playset has also been confirmed. In conclusion, collectors can rest assured that three of the four playsets discussed here stood the test of time and represent physical examples of argueably one of the nicest unproduced Super Powers toys. It is possible that a few more playsets exist and could one day possibly surface onto the market, however there is surely no guarantee of this occuring. Owning an example of this playset would certainly be any Super Powers collector's dream come true.