So much of this is speculation and "I heard from this unnamed source".if you guys really think DC is going to do another full universe reboot before Doomsday Clock (the event that's supposed to tie up the loose threads from the LAST reboot) is even finished then you are very gullible.
I can buy that they are going to do a semi "fresh start" but it won't be for another 2 years probably, and even then it's just going to be a Rebirth2.0 that essentially just confirms the canon of the universe so that nothing's "up in the air" or "hypertime". DClock will probably have some sort of epilogue that sponges up the messy bits of the universe and makes all the characters free and available for use.
The creative team chinese fire drill is definitely happening because some of it is already in motion. Morrison IS writing for DC again (see Metal, and then Sideways upcoming issues) and Venditti IS leaving HalnPals. Titans is getting a new writer if I remember correctly but no news on Aquaman besides this new KSD rumour. Humphries is moving to Harley Quinn so Nightwing is also going to be available. Basically, take all the RUMOURS with a grain of salt cause most likely only the ones about the writers that are coming in are true at all.