The scientists are considering already, here exists so called "hot" and "cold" dark matter.
By my opinion, the cold matter is simply more dense vacuum foam due the relativistic effects of omnidirectional Universe expansion.
The hot dark matter is composed of particles, supposedly antimatter which has evaporated on behalf of ordinary matter during inflation period. The ionized atom nuclei, neutrinos and other particles can be present here to. The existence of WIMPs is not very clear for me, because such particles must be very stable to form a clouds of dark matter. We should observe them in colliders already.
Both portions of dark matter affect (attract) each other, but the influence of cold dark matter is prevailing, because it forms the largest portion of dark matter mass.
