Mrred, not sure what you are talking about. The latent image is only used in the first developer. And, silver is silver as far as the bleach step is concerned. Any and all Silver metal is converted to Silver Sulfate which washes out. By the time the film hits the bleach, there is no latent image to be concerned about.
Fog is not related, in this instance, to latent image in the sense that you are forcing a silver halide solvent to cause physical development and concomitant fog, to allow an overall increase in density that then allows the clean out of the final white areas. Without the fog, caused by the solvent, the whites would be very gray in the final image.
Now, there are some developers that work without solvent action, but I am not going into that here.