The film's antagonist, Sudeep, who is more like the hero of the project (after the fly of course), has confirmed this news on his microblogging page...
Directed by SS Rajamouli, Naan Ee stars Nani, Sudeep and Samantha and is more of a good vs. evil battle, with the hero avenging his death by reincarnating as a fly. The CG works of the film were largely praised and it attracted family audience of all ages, including little tots, thanks to the clean script.
In Hindi, parts where Nani appeared alone seem to have been re-shot with Abhishek Bachchan. The rest of the film has been dubbed.
SS Rajamouli managed to make a blockbuster with a fly in the south where heroes are worshipped, whether the film will work among Hindi audience who are mostly about stardom and glam remains to be seen!