I was blown away by the GHI mojave last year (have any updated pics been posted recently?). There seems to have been a combined effect of two dark genes that was off the scale. Will be a while before I can get a GHI so I'm hoping that other dark morphs might have a similar combined effect. Maybe a black pastel chocolate will not be more than either piece but I'm hoping it would be extra dark.
Here is a pic of my chocolate mojave girl.
I'm really hoping she produces a combo with one additional dark allele (a 2nd chocolate or cinnamon) to really get going toward a black ball python.