system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] What if Thor had Stormbreaker in the first Avengers movie?

How would the events of the first Avenges movie have changed if Thor had Stormbreaker by this time?
gpt
He would've grabbed Loki from the Quinjet then used the Bifrost to zap back to Asgard.  Odin would add the Mind Stone from Loki's scepter to his treasure room.

Tony, Cap, and Natasha would be left scratching their heads.

Later, Clint would show up to attack the helicarrier, not knowing his mind-controlling boss was gone.  He'd be captured and returned to normal.  

Then Tony would get notice that his building's security picked up Eric Selvig trying to smuggle a device to his roof.  The Tesseract would be recaptured by SHIELD.  

The pre-Avengers team would all go their separate ways.  Phil Coulson would continue to work his way up through the ranks of SHIELD until being cut down when HYDRA took over.  Sky Johnson would be apprehended for infiltrating secure government servers and wind up with a criminal record.

A faction of HYDRA would use the Tesseract to finally retrieve Hive from Maveth, ushering in the Age of Inhumans.  Millions die.  An undercover, on-the-run Nick Fury would reactivate the Avengers to battle the threat.