History
Henry Pym was present at Avengers Tower in order to devise a plan of stopping the Celestial Exitar the Executioner from destroying the Earth.[1]
He along with the rest of the group put together by Iron Man helped construct and maintain a force field generator which was meant to project a shield around the entire planet in hopes that it would hold off Exitar's attacks. But the field only lasted for a short while since the generator couldn't handle the extremely powerful attacks which led to the group's demise and Earth's destruction.[2]
Pym apparently died off-panel due to Exitar destroying the Earth.