I think it depends on what you mean by "dark matter" and "dark energy". If you think they're theorized substances or energy sources (which seems to be the prefe

I think it depends on what you mean by "dark matter" and "dark energy". If you think they're theorized substances or energy sources (which seems to be the preferred interpretation in the press), then, yeah, there seems to be a decent chance that that will be the case. If you think, as more cautiously-minded folks seem to, that they're just clever catchwords to describe troubling lacunae in our understanding of how the universe works, not so much. There really are observations that we have trouble explaining.