I don't think editorial would that happen.
Yes, because DiDio-era DC Editorial is oh-so "competent", to the point that it can't:
Make sure a MAJOR CROSSOVER like Final Crisis agrees with its overblown year-long weekly lead-in, Countdown to Final Crisis. OR, for that matter, fellow tie-in Death of the New Gods.
Keep Aquaman from being brought back during FC because, according to Geoff "I Run This Asylum, Not Morrison!!" Johns
, he is supposed to be brought back during Blackest Night. (Thus leading Dan to, in his usual lame@$$ manner, have to backpedal, and claim that it was "another Earth's Aquaman", as if they did this crap on purpose.
Along the same lines, decide whether Hawkgirl should be killed off during FC or BN. They certainly can't make a choice in a TIMELY enough manner to let JLoA writer Dwayne McDuffie know so he won't write a scene in which Roy Harper visits her grave, and certainly NOT before said scene is already pencilled and inked, so that McDuffie has to awkwardly rewrite the scene, and it STILL makes NO sense.
So, this is the DC Editorial you don't think would "let that happen". Riiiiiiiiiiight.
Check their track record, pal.
Like I said: Usual Gang of IDIOTS