That was the fate of Suicide Squad to New Suicide Squad, Teen Titans to New Teen Titans, Red Hood And The Outlaws to Red Hood And Arsenal, Constantine to Constantine The Hellblazer, Earth 2 to Earth 2: Society and Justice League 3000 to Justice League 3001.
I am told to expect, after the fifty-second issue of the remaining big books in May, to see a number of titles undergo a relaunch and retitle. Possibly with new creative teams, possibly not. But it's an easy way to get the benefit of an issue 1 bump, and maybe a way to refocus and advertise the appeal of a comic with a new title.
It's a way of saying, "this is what it was, this is what it is now."
And hopefully not a way of saying "so now you don't have to buy it any more…"