Yeah. Tim fans are loud and proud, but Damian fans are a whole different ballgame. There're the ones that are online and in discussion groups and attending cons and seem to be a minority and then there are...the other ones. The older ones that scare Didio, Johns, the rest of DC's editorial board and many of their writers because they don't know where they came from, adults in their late 20s and older don't suddenly start reading comics.
Remember that the average Damian fan is over thirty, has children, prefers digital over floppies and live tv, and makes purchasing decisions. If YJ wants to survive, both as a cartoon* and a comic, it has to woo the Damian fan base. Upsetting them gets a writer's pet character put on a bus. It's what happened to Harper, it's what's been happening to Tim, it's why every Duke writer makes sure to have Duke fan boy Damian to try and stave off their anger.
More importantly, Damian fans universally adore Dick. It's why Grayson survived and had librarians (who are known for liking Damian) listing it as a must read comic in End of Year favorites. Right now, Dick and Damian seem to be endangered and neglected. In a few months, they go back to Papa Tomasi in Detective Comics. Which, it should be noted, the con panels are avoiding mentioning.
Why? Because if, when, Tomasi brings back all the old Batman & Robin fans, and adds in all the new Damian fans his Detective Comics will be in the monthly top ten both digitally and hard copy. It will drag up Super Sons, Teen Titans, and Nightwing in sales, all of which already have acceptable floppy sales and huge digital sales. Single dad Bruce balancing work life, relationships with adult, near adult children, and the unexpected late child is incredibly relatable; much more so than the Bruce Wayne that King's been writing. People loved Batman and Robin: it allowed them to re-self insert themselves as Dick or Bruce. Tomasi knows this, Snyder has accepted it, Priest was amazed by it (and how starved fans are for it), others who aren't super star writers realize it and embrace it even if it means they don't get the diamond sales and have to rely on digital love.
Let Bendis, Johns, and Didio come for Dick and Damian. They've already attempted to destroy and eliminate them and failed. Tomasi has a crop of newer writers eager to write Dick and Damian stories, and a large fan base. This is a fight Dick and Damian fans have won before, they will win it again.
*Damian will appear in the cartoon, whether or not the writers want him to. Some people might recall how Veronica Mars and Stephanie Brown fans saved their characters by bombarding the executives with food. Damian fans upped their game by sending birth announcements. According to the Social Security baby name database, there are over 50,000 boys born after 2007 named Damian. If you dig deep into the demographics, their births are correlate with periods after Damian's deaths. In other words, all of them are named for a comic character from the beloved ship of their parents' teens and childhood. Young Justice creators understand this demographic is the one to acknowledge. As much as Johns and Didio hate him, Damian is the marketable Robin, Dick and Jon are part of his appeal. It'd be shocking if the Super Sons don't appear in the cartoon.