To be fair, and I say this as someone who disliked Batman: Dead End- a lot, and I mean a lot of fans, especially here, thought Dead End was a big deal. This came out two years before Begins, when we were knee deep in pop culture seeing Batman as Schumacher status. It made some people take notice and see that dark Batman could still be done on film, especially after most fans had given up hope in the early 2000s.
I still get shivers thinking about people posting the Dead End costume and demanding that Nolan follow it.