I really wish more big game studios were more generous when it comes to collections. By that I mean, I wish they included obscure titles, strange ports, and small spinoffs in their collections. The Street Fighter Collection should include each home console release of the games, along with the Movie game and 2010. Castlevania collection should include 64, Haunted Castle/Vampire Killer, and Dracula X. Mega Man Legacy Collection could include the GameBoy titles, Wily Wars, Soccer or even the DOS games.
There’s no way the games would be rereleased otherwise... So why not?