We know about many lost ancient works. We know authors and titles, but we don’t have the texts. It would be great to find out that some of the missing works have become available to us.
I wholeheartedly agree. Some of the nearly completely lost history works would be nice, such as Emperor Claudius', Hecataeus of Miletus' books (two are known only from short quotes in other authors'), missing books from mostly surviving works, and any formerly completely unknown works. Hey just spitballin' here. ;^)