I would be curious to know what else had been on Goodman's wish list before the apparent change. I think they clearly got through the ones that best fit their vibe that there would also be a strong audience for. Other than the two versions of the Palace of the Silver Princess, I don't know that there are many classic TSR adventures left that would have a satisfying enough history to merit the OAR treatment (since, for Goodman, these books serving as history books is clearly important).
It's entirely possible that they were ready to switch their focus over to Judges Guild and Flying Buffalo anyway.