IMO, the franchise as a whole lost momentum by not putting out a new film. Even when B & R stunk out the joint, we didnt go a decade without a new Batfilm.
Yep I think it really hurt the relevance of the Superman brand on a larger scale quite a bit.
It wouldn't have just exposed the character and his universe to a wider audience. It also would've helped the slumping sales of his comic books at the time too without having to rely on stuff like "Death of Clark Kent" or Electric Blue Superman (which for the record I did enjoy but then again I am a lifelong Superman fan).
An entire generation missed out on Supes and it really hindered the perception the general public had of him. To this day the character is still trying to awkwardly regain his footing and momentum in the greater pop culture landscape as one of if not
the top tier superhero(es).
This is why I laugh when people go "bla bla bla DC should not be wasting time putting their heroes on TV just stick to making movies if they want to use them in multimedia". IMO DC needs to use their IPs in as many forms of mass media as they can especially with Marvel lapping them right now in terms of pop culture relevance. I mean look at what Burton's movie and it's Batmania did to Batman. It made him
the quintessential DC hero for over 25 years now.
You really think if The Flash and Arrow didn't have prominent shows on prime time television right now they would've even been considered to be Batman's partners in crime in the upcoming Batman Unlimited DVD's? I think not.
The more media DC could use their IP's in to introduce them to the non-comic book reading audience (Ie: video games, movies, TV shows etc.) the healthier it is for DC overall and the greater the chances are for those of us who are more hardcore fans to get to see potential Metal Men or Legion of Superheroes multimedia properties. Instead of just Batman, Batman and Batman all the time.