It's long past time for these books, especially BoP which was absolutely gutted by the (non-existent) conclusion of the first arc, failure to retain its artists and then the unceremonious jettisoning of its most appealing characters, Starling and Ivy. The series had absolutely nothing after that.
Batwing went from being a the first book to star an non-American Batman, and an African at that, to a book that existed to filll the niche that Nightwing traditionally occupied - the friendly neighbourhood Bat dude. Now that Dick's out of the doldrums and onto brighter things we don't need a knock-off hanging around and Gray and Palmiotti are free to do better things elsewhere. Catwoman or even better, and Batman Incorporated book would be right up their alley.
So is that four titles that Eternal has effectively replaced now? Dark Knight, Talon, BoP and Batwing.