Stage AGs have a strong role to play in anti-trust law. And the other party they're suing _isnt_ a Federal agency this time.

Now maybe nothing matters. But conflicts of interest will come up in those cases. Trump doesn't win _everything_. Trump wins at places where the Supreme Court is using him for their own project of reworking the constitutional order. Basically Trump shoots up a volley with some absolutely batshit PoV, they interpret the topic in some saner (still crazy) right wing legal idea. And the Supreme Court fast track's these cases about executive power.

This case would be State AGs having independent standing to challenge major M&A.

It will drag things out at a minimum, in a way the Supreme Court's rapid resolution of executive branch cases is not dragged out.