My theory on the term Reclaimer Mantle theory

We all know that the Forerunners called us the Reclaimers (well, at least when they saw our potential). The Forerunners found out from the Primordial that we are supposed to inherit (or reclaim)the Mantle. What I think possibly is that maybe we’ll have to fight the Precursors, and possibly reclaim the Mantle. What do you think of this theory, does it sound good or stupid?