People think that at the end when it says assimilation complete that it means prophet and alcatraz are like put together or something. but maybe it means the BIOcode that kills the ceph is completed. because when the suit is put to test by hargreeve and when he tells you to enter the spore it says "assimilating biocode" and we all know the biocode is what kills the ceph by turning the nanos against them somehow. so what if assimilation complete just means the suit is done or fully upgraded and can now be used like it was meant to be used my prophet. to enter Spores and destroy the ceph buildings underground.