One million Superman!

Superman recently freed the city of Kandor and its inhabitant of the fortress of Brainiac. The Earth is left with hundreds of Kryptonian while some was already frightened by the so-called still there is little the last survivor of Krypton. How will the Earth accept the arrival of these new "Supermen", that's what will be discussed in the Saga New Krypton.

This first collection is quite interesting since it is primarily concerned with two secondary characters in the Superman universe: a road trip with Jimmy Olsen, very well written elsewhere; then the return of the Guardian in the streets of Metropolis, classic but effective.
The rest of the book is devoted to New Krypton course, but very slowly and intelligently installs the feeling of incomprehension between earthling and Kryptonian, with the center of it all, a Superman a little lost but still full of hope and naive.
In short, if you want to know the entire history of New Krypton, so prefer VO collections rather than the French edition that does that focuses on the main story.