The ComicBloc has a lengthy interview with writer Adam Beechen, who talks about leaving Robin and — rather abruptly — Teen Titans for Countdown and Countdown to Adventure:
I love the Titans and I always will, but the chance to start a book from issue #1 and develop a title’s voice using characters I happen to really like is just a great opportunity. And 52 left these particular characters in great places where a lot could be done with them — they could be taken any number of ways. By the way, this works out well for Teen Titans, too.
As happy as some of that book’s fans are that I’m leaving the title, they should really be excited that Sean McKeever’s the guy coming in to take it over. He’s good. I mean, really, really good. I’m loving his stuff for Countdown and anyone who’s seen his work elsewhere knows how well he gets the teen voices. The book is in very good hands.
Beechen also reveals a deep desire to write Aquaman: “He was one of the first superheroes I gravitated toward as a little kid. I’ve got a great story for him I’d love to tell one day, but it runs counter to the direction the character’s moving in now, so maybe it can be a ‘down the road’ thing.”