I think you need to conflate the McGahn timing into that. Appeals on the Kupperman one would go well into January at the absolute earliest, and McGahn will for sure be decided (unless SC agrees to hear it) before then. Because of that, it’s a superfluous subpoena that was filed before the appeal was heard on McGahn.
If they weren’t getting an initial answer super quickly, there’s no reason for it. They have enough evidence without Kupperman and Bolton. If Bolton gets subpoenaed, he’d join that Kupperman lawsuit, which could destroy the timing if they do want to call him when they win McGahn. If they win McGahn, Bolton has pretty much said he will honor a subpoena (lolhim if he didn’t see this coming).
I think the subpoena drop is much less likely due to timing on impeachment than a decision on the McGahn case making the Kupperman suit irrelevant and a delaying tactic.
Is there a uniform date for this?