NWC has always approved sci-fi in HoMM sub-series and said it belongs there because Heroes is part of MM universe.
New World Computing wrote:Q: DOES SCIENCE FICTION BELONG IN HEROES?
http://www.heroesofmightandmagic.com/fo ... =interview
And this was written after the Forge town was cancelled, so one can tell that NWC did it under pressure (i.e. death threats) and was still considering sci-fi authentic to HoMM.
New World Computing wrote:Q: WILL THE FORGE RETURN?
GF: Perhaps, but not in its current form.