DiDio and fellow co-publisher Jim Lee discussed DC's upcoming plans for 2013 and Lee's departure from Justice League.
"It's still New! I think the New X-Men have been 'New' for a very long time, so don't knock my New off so soon!" DiDio told Comic Book Resources regarding the title of the publisher's relaunched universe.
Lee revealed that he had always planned to leave art duties on the flagship Justice League title to help launch other books.
"Obviously my last issue of Justice League was #12, but we couldn't reveal that at the time, but the plan was for me to leave that book and help launch this new Superman book in anticipation of the 75th anniversary in 2013," he said.
Lee will work with Scott Snyder on the yet-to-be-titled Superman book.
The pair also mentioned 'Trinity War', the publisher's first major crossover since its 2011 relaunch, which they said did not refer to the 'trinity' of Superman, Wonder Woman and Batman.
"Without giving it away, 'Trinity War' - the word 'trinity' resonates throughout the project on many, many levels and so in a sense there's almost three distinct parts," said Lee.
"Well, almost three stories combined into one and then each part really redefines the universe in a really cool and unexpected way."