One shot containing previously unpublished conceptual artwork and sketches.
Collected in Earth X Trilogy Omnibus: Alpha.
Translated into Spanish.
Note: Despite the title using the word "omnibus", this volume does not reprint any previously published issues.
— Description from Comic Vine community (comicvine.gamespot.com · https://comicvine.gamespot.com/universe-x-omnibus/4050-20892/).
