Ever since the 2014 debut of The Mighty Thor, mystery shrouded the identity of who could wield Mjölnir other than Thor Odinson. The new god of thunder was later revealed to be Jane Foster, gaining her new abilities after her predecessor lost his worthiness during a fight with Nick Fury.
Before that, Foster was diagnosed with breast cancer and asked by Odinson to be an earthly representative during the Congress of Worlds, undergoing therapy on Asgard while refusing magical treatments.
Foster was present during Secret Wars; being one of the heroes attempting to keep her world in one piece. After many conflicts and trials, it appears that Marvel Comics will be giving The Mighty Thor a final battle for the ages.