User blog comment:Rassilon of Old/Young Justice spoilers at Comic-Con 2012/@comment-5327763-20120724193719/@comment-5188724-20120724205504

Well the "don't die" part can also be taken simply as Nightwing showing concern for this younger brother. We don't know whether Bruce adopted Tim in this continuity, so Dick and Tim might not be legal siblings, but Tim is still Dick's successor as Robin. I think it is reasonable to say that their relationship is brotherly, or at least very close considering how Nightwing talks to Tim the same casual way he used to talk to Kid Flash ("Dude, way to get your feet wet!"). Furthermore, its not that a lot of us hate Jason Todd as a character, its just that we are irritated at how many fans insist that Jason Todd is in this continuity when there is no evidence beyond what is only possibly implied from what Nightwing said above. In my opinion, fans are getting this implication for Jason by overanalyzing this one line.