Thor in New Avengers 27 has Mjolnir again. Seems the hammer that the woman is using is an alternate universe's Mjolnir. (or it is 616's and Thor is using the Alt's, the issue isn't 100% clear) During a fight with Black Priests that looks like it will be the end of the Multiversal team, Thor says his last battle must be with his Hammer and reveals it strapped to his back and grabs it and brings the Thunder.