There are rumors in the press that Mat Ishbia will offer to buy
the Washington Commanders. Apparently he has the requisite
assets. It seems unlikely that he would move the team to
Pontiac. The Silverdome is gone.

I am not sure what rules the NFL has about changing the
location of a franchise but several teams recently have
shifted from one location to another. Those locations moves
are not rare in the NFL at this time. I suspect that moving
a team away from the nation's capital is a little more
challenging than moving a team away from Oakland,
Baltimore or St. Louis.