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We investigate the consequences of superkicks on the population ofsupermassive black holes (SMBHs) in the Universe residing in brightest clustergalaxies (BCGs). There is strong observational evidence that BCGs grewprominently at late times (up to a factor 2-4 in mass from z=1), mainly throughmergers with satellite galaxies from the cluster, and they are known to hostthe most massive SMBHs ever observed. Those SMBHs are also expected to growhierarchically, experiencing a series of mergers with other SMBHs brought in bymerging satellites. Because of the net linear momentum taken away from theasymmetric gravitational wave emission, the remnant SMBH experiences a kick inthe opposite direction. Kicks may be as large as ~5000 Km/s ("superkicks"),pushing the SMBHs out in the cluster outskirts for a time comparable togalaxy-evolution timescales. We predict, under a number of plausibleassumptions, that superkicks can efficiently eject SMBHs from BCGs, bringingtheir occupation fraction down to a likely range 0.9<f<0.99 in the localUniverse. Future thirty-meter-class telescopes like ELT and TMT will be capableof measuring SMBHs in hundreds of BCGs up to z=0.2, testing the occurrence ofsuperkicks in nature and the strong-gravity regime of SMBH mergers.

Missing black holes in brightest cluster galaxies as evidence for the occurrence of superkicks in nature