News of who were serving in the production of the show, and the image of the show's first promotional poster.
Oh, they are making a new animat... Holy crap, Greg Weisman is producing (and writing)!
To a lesser extent, Brandon Vietti's involvement in the show as producer sparked excitement from those who were familiar with his directing Batman: Under the Red Hood.
Peter David, the man who wrote almost all the issues of Young Justice, is on board to write for the series.
Phil Bourassa had a good reception for the character designs he produced for Justice League: Crisis on Two Earths. Once it was announced that he would be one of the main character designers for this show, a lot of fans were happy.
Secret appearing in an episode appropriately written by Peter David. She's the first such Young Justice comics member to appear in the show — if one doesn't count Superboy, since his cartoon characterization is drawn from his later Teen Titans days and much unlike his earlier self.
Fans of Teen Titans were excited when they found out Garfield Logan a.k.a. Beast Boy was going to appear.
Superman warming up to Superboy in the end of Season 1.
There was much rejoicing when it was revealed that Jaime Reyes would join in Season 2.
Tim Drake coming in as the new Robin while Dick grew up to become Nightwing.
Wonder Girl (Cassandra Sandsmark) finally being used in a DC animated show. Like Tim Drake and Superboy — and unlike most of the cartoon team — she was in the original Young Justice comics, all the more reason for some fans to rejoice. (At the same time the original Wonder Girl, Donna Troy, is in Super Best Friends Forever).
And as of the SDCC 2012 trailer, we've got Static and Deathstroke, Artemis in a Tigress costume, and possibly Black Beetle, who has been reworked to be a part of the Reach.
Fans rejoiced and wailed at the same time with the revelation that Jason Todd exists...and already died.
Hey its Nightwing, but who is he talking to? Did-did he say "Oracle"?! YES! We're getting Oracle for a whole season, instead of one episode of The Batman and a stinger for those who kept watching "The Killing Joke" after the unrelated, unneeded prequel no one asked for.
More characters and stuff confirmed for Season 3 up to Comic Con: Katana, Geo-Force, Livewire, Terra, Orion, Metamorpho, Forager, Batman versus Bane, Sensei and Lobo are back and fighting, Black Spider and Brick return, Cheshire and the Forever People!
Cassandra Cain is in the most recent trailer! No Bat-embargo for Cass due to the live-action Birds of Prey movie!!!!
The season 3 second half trailer revealed the return of Amanda Waller and what may just be the Suicide Squad featuring the Black Manta, Mallah, and the YJ debut of Captain Boomerang.
The June promo for the same period also revealed the debut of Big Barda.
had a good reception for the character designs he produced for Justice League: Crisis on Two Earths. Once it was announced that he would be one of the main character designers for this show, a lot of fans were happy.
