If I may...?
Back in 1999, Wizard of the Coast (owners of TSR, and all the brands/trademarks/etc. for Dungeons & Dragons) decided to release a "25 years of Dragon Magazine CD-ROM Archive", a compilation in .PDF of the print magazine that was launched in support of D&D back in '74.
Well it was pretty well received by the fans...but suddenly a bunch of people who'd written for it over the years came out of the woodwork and wanted to know why they weren't getting any compensation for sales of the magazine, or why their stuff was being used without permission. As soon as initial stocks of the compilation CD-ROMs ran out, Wizards pulled the product, but not before they had to enter into an agreement with Kenzer & Co. to license the older D&D rules for a time.
That's a good cautionary tale to consider before leaping in to such an endeavor.
