Add in Soul Lava and Soul Blazes to soul sand valleys

There where once soul lava particles in the game's FILES, but it never saw the light of day, or should I say the heat of the Nether? I think Mojang should put this Idea to full use. It would be cool to see. Also, maybe if a Nether Fortress were to spawn in a Soul Sand Valley, maybe, instead of regular Blazes, there could be Soul Blazes, or maybe there could be a rare chance, i don't know, I just want Soul Lava and Soul Blazes.