While Klaus's idea (union of gamuts) is a definite improvement for
groups of images, this still does not solve the problem of adapting
the gamut for individual fine art images, since in fine art one will
frequently decide to "burn out" (saturate) some colors which are not
deemed significant in order to gain nuances for the other significant
colors. This is done at soft-proof time, and is similar to deciding
which parts of an image will be dropped into black or burnt to white.
Someone interested in a research topic might find it profitable to
look at manipulations of the saturation component.
