Marvel is billing March's Mighty Thor #705 as the issue which Thor (a.k.a. Jane Foster) will die, as previously teased in various ways - including an on-the-nose title to the current arc.
“The Death of the Mighty Thor” kicked off in October’s Mighty Thor #700, but now it appears that March’s Mighty Thor #705 is the actual issue in which Jane Foster will, in Marvel’s words, “make the ultimate heroic sacrifice” in the fight against the monstrous Mangog.
“This is it, folks! The big showdown between Thor and Mangog. The penultimate chapter of ‘The Death of the Mighty Thor,’” said series editor Wil Moss in a statment. “Jason Aaron and Russell Dauterman have been building to this issue for over three years, and you absolutely do not want to miss this. You may think you know where things are going, but I promise you do not.”
Jane Foster has been Thor since Odinson, the original hero to bear the name, became unworthy of his hammer Mjolnir in 2014’s Original Sin. In her time as Thor, Foster has battled cancer, with every moment she spends as a hero taking time off her life. A variant cover for Mighty Thor #700 featured Foster in a pose similar to the cover of the Marvel graphic novel The Death of Captain Marvel in which the Kree warrior Mar-Vell died of cancer.
The Mighty Thor #705, which Marvel promises is “the beginning of a mind-shattering conclusion that will change the Thor story in explosive ways,” is due out on shelves March 21, 2018.