While there have been rumblings about this in the past, it appears matters may be coming to a sudden head.
"We are requesting that the Maricopa County Stadium District allow AZPB Limited Partnership (the team’s owner) the right to take such actions as it deems necessary in order to move and play Diamondbacks’ baseball games in a location other than Chase Field"
That's how the current situation, first reported by 12 News, kicked of, with a brief letter sent on March 16 from the team's President, Derrick Hall, to the Maricopa County Board.