Zelda, Sonic, Mario, Megaman, Metal Slug (Korea only but works on U.S computers) and the 1st 3 mortal kombat games are getting into 1 disc so tell me, what good series should now have a collector's edition?

I think Megaman X should have it's own. Most of the games kick ass and there would be enough space to add the first 6 Megaman X games.