I feel oddly Zen about this. If he picks the Red Sox that is incredible for all the reasons we've spent months rehashing.
If he picks the Yankees then we already know he alone doesn't suddenly guarantee them winning a title, so it's not as devastating as some previous signings had felt at the time they happened, plus his cost could genuinely damage their plans long term.
If he picks the Mets, we'll ... I'm biased and just can't ever consider the Mets to be super relevant to anything that matters outside of media market stuff.
There's no outcome here that will feel gut wrenching to me. If anything my greatest fear as a Sox fan was that the ownership doesn't actually want to win anymore, and them being legitimate bidders in this case doesn't solve that, but it doesn't cement it or anything.
I feel fine with whatever happens.