There is now a very basic outline version of the DragonQuest combat rules posted at DQRules. I’m providing extra notice here for those of you who are following Antherwyck House for DQ-related stuff since there are more followers here than there are on DQRules itself. There are PDF and .DOC versions, as well as a pretty bare plain text, so hopefully at least one of those will provide a useful version.
This is just the bare bones of the DQ combat rules, but is probably enough to run combats if you already have some familiarity with the game. More importantly, it is the basic skeleton on which the system is built, so a retro-clone would start with this framework and expand out to flesh things out once more.
The other series of questions to be considered are regarding whether any of these core rules should be modified or revised as part of the new version of DQ. A total retro-clone would stick to this with very little deviation, but a new edition of DQ should consider improvements and modifications.
Before things get too in-depth, this needs to be the next set of considerations. There are some ideas already being kicked around, but additional feedback would be especially useful for this project.