...Although there did circulate a persistent rumor about a wreckbash that featured two "
Constitution" nacelles bolted straight to the saucertop, with a secondary hull below. This was apparently how a fan had interpreted a brief glimpse of the
Springfield class in a slide show thrown by Okuda in a convention - that ship has two marker pen nacelles atop and a secondary hull below, and does not look particularly TNG-eraish in the extremely poor quality photo that was apparently used in the slide show. As the result, we got some fan interpretations that looked more or less like the
Marco Polo...
The real
Springfield:
http://www.shipschematics.net/startrek/images/federation/cruiser_springfield.jpg
The usual fan take:
http://www.shipschematics.net/startrek/images/federation/heavycruiser_challenger1.jpg
A take closer to the comic art:
http://www.shipschematics.net/startrek/images/federation/heavycruiser_challenger1_up.jpg
The actual comic art:
Apparently, the confusion thus arose from there being a
Challenger class in the slide show and a
Challenger class in the comic world, and there being a report of what shapes of ships had been seen in the slide show and a fan awareness of what "the
Challenger class" ought to look like...
In retrospect, the comic book art vessel might represent yet another subtle "subclass" of the sort that litter the fandom TOS movie era fleets, while the "real" TNG era ship represents an actual "class" in a more simplified fleet system. That way, Starfleet doesn't end up with two
Challenger classes that would apparently serve side by side!
(In RL, the USN has tended to avoid repeating a class name, while the Royal Navy has multiple repeats and overlaps, largely because RN ships often get thematical names, and such themes are limited in number - County class, Town class, Tribal class, and for some reason several Daring classes as well.)
Timo Saloniemi