Peter Tomasi has been the editor for "GL: Rebirth", "Green Lantern" and "Green Lantern Corps" comics from 2004 to 2007, then he shifted to the writer of "Green Lantern Corps" and "Nightwing" in 2008.
So, if it possible that Tomasi knew the "Blackest Night" project before? And maybe "a new secured tombs for old dead heroes" happened in "Nightwing" was not just a coincidence nor some used-for-once event?