This week Generations: The Unworthy Thor & The Mighty Thor
came out. If you like Jason Aaron's Thor run (which stretches back to November 2012
*) then Jason Aaron's enerations: The Unworthy Thor & The Mighty Thor is another issue of Jason Aaron's Thor. I enjoyed it immensely.
Unfortunately, the labelling makes it slightly confusing as to who actually appears.
While there is no doubt as to who is the Mighty Thor, the Unworthy Thor isn't who might first come to mind. A better term might be the Pre-Worthy Thor who has not yet proved himself worthy of wielding a Mjolnir, rather than the Post-Worthy Thor with the Uru arm, who lost Mjolnir and took up Jarnbjorn because Nick Fury whispered to him on the moon.
Generations is a decent self-contained story (but with a shoe-horned in epilogue that does nothing for me) about why a Thor needs Midgard and what it means to be a God and when ( Thor first met Thor )