That really depends on each of the Classics. Here's the basics, followed by a little about each of the four Classics books.
The Stretch Goal books will be much closer to the original 2nd edition books that came out from 1978-1983. They will have the original covers, no new art, etc. Some people want just a nice copy of the original book that will last, without paying collector prices for an original.
The Gloranthan Classics:
Pavis & Big Rubble has been out of print for over 5 years. Yep, even the reprint is out of print. It came out in 1999. We actually can't reprint it as is right now because it was done on film. We don't have PDFs to just send to the printer and get more done. A lot of the art used was fixed by the printer and they didn't save those files, so we have to clean up the art to reprint it. We want to get it back into print, thus the stretch goals.
Griffin Mountain: This never had the big maps done for it. It needs some cleaning up. The new art we added is loved by some and not by others. We only have a few printed copies left to sell.
Cult Compendium: This is a large tome that covers RQ2 and RQ3 cults. Like Griffin Mountain the new art is loved by some and not by others. We don't have many printed copies left.
Borderlands and Beyond is the same as the previous two.
For those who are into Desktop Publishing, all of the Classics were done on Pagemaker, which was great 15-20 years ago, but is extinct now (replaced by InDesign), and using it to update the layout files isn't an easy option (I tried).
None of the above exist as "ePub" books either, which is something we have the chance to do via this project.
Also worth noting is that none of the Gloranthan Classics PDFs are bookmarked. Nobody seemed to mind in 2001, but they do now. Another embarrassing thing to admit is the Gloranthan Classics were not professionally edited, and the OCR software I (Rick) used was not very good at correcting scan errors. Lots of the letter "L" or "O" became the number "1" or "0", and words often got incorrectly created. "Leader" got read as "Loader" etc. I caught maybe 98% of these, buy when you have 100,000 words to get right, they start to add up.