There's kind of a "problem" (depending on how you look at it) here. It turns out there are fifteen books in the "Guardians of Ga'Hoole" series. CGI or not (animated or not, for that matter), does Warner Bros. plan to use this series to "fill" the perceived "void" that the Harry Potter series will "leave behind"? The books form an ongoing plot (i.e., one that continues in the "next" book).
Either way, I think they're being kind of presumptuous (sp?) in thinking that this could be their next "hit" franchise. Still, after having read a summary of the first three books (which this movie will adapt) on Wikipedia, I think I might give this movie a try, at least.