The phrase "radical reinvention" means making a big and significant change by completely transforming or starting over with something, in a completely new and different way. Full definition
The new Pokémon Sun and Moon, however, mark the most radical reinvention of the beloved franchise since 1996. (dailydot.com)
Beginning with Brian Michael Bendis and Alex Maleev's run and all the way to the end of the decade with Brubaker, no other character left the 2000s so much better than he'd come in — and this was a decade marked by radical reinvention and reinterpretation. (berkeleyplaceblog.com)
Kaya Oakes» memoir Radical Reinvention, for example, «is a pastorally instructive testament to authentic religious reconsideration.» (firstthings.com)