Solomon Grundy's presence in the initially announced roster was rejoiced not just by fans of the character, but also by fans of other B-list characters in the hopes that they might have a shot at getting in as well.
Black Adam's confirmation certainly made a lot of fans happy.
The Green Lantern story trailer gives one happy rejoicing for Raven fans: You know how she spoke with a distorted, demonic voice that didn't sound like the expected Tara Strong in the her reveal trailer? In GL's trailer, the distortion is gone and she certainly sounds more like a woman, despite being more adult than teen. Add to the fact that Tara Strong herself tweeted that she did voice Raven after all, the fans are happy again.
During the Battle Arena Finale, Ed Boon himself revealed that the first DLC character would be the Main Man himself, Lobo.
Including a blue reskin of Nightwing's New 52 costume was one to fans of the character, who have bemoaned the fact that he's been wearing red since the reboot.
In fact, the fact that the evil one is wearing red could even be seen as a Take That! to it.
Martian Manhunter being heavily hinted at to be DLC, courtesy of a close-up of him at the end of Scorpion's trailer, has caused much rejoicing from his fans.
After the reaction to the DLC characters being less than favourable to another member of the Bat Cast & the Mortal Kombat mascot being added to the game, the anouncement of a second batch of DLC (Supposedly having taken fan requests into account) has prompted this reaction.
The first character? Martian Manhunter, with Carl Lumbly reprising the role from Justice League, coupled with the anouncement that Green Lantern will be receiving a John Stewart skin, complete with Phil LaMarr reprising the role aswell!