If you check the folders as well, all the .WADs are there for everything (if you want to use them with a different port/engine). Not sure if it detected which games I already owned, but my version is actually Doom + Doom 2 + Final Doom + Master Levels + Sigil + NRFTL + LOR (new campaign). Plus all the featured mods (from the recent console ports) and a regular user-driven mod browser.

It's a pretty overwhelming update to the already decent Kex engine port that's been on consoles for a while. They added a bunch of dvd-extras too like concept art and such. It's not my favorite way to play but it's still a pretty great free update!