You know, the topic you're discussing is inevitable... heroes get old, people don't have enough time for them... young people are more interested in shooters and the like... adults have probably grown up and have their own problems...

How to solve this? And how, really?? You can't reinvent the wheel, you can't create new heroes... although that's an idea... maybe integrate some kind of hero-themed game (quiz) into the forum.
Or something else... a forum revolution, or rather a major reorganization... although why change something that's already good... but it's worth considering...

So, you're saying that heroes have no future?
And in general, if you create an off-topic heroes section, everyone will go there until Heroes 6 comes out, and after that, when it's no longer new, everyone will go back again.

I think creating an off-topic heroes section is a bad idea (it just won't be different from many free and semi-free themed forums).

I think the solution is to remove the "flood" section and allow people to chat freely only on hero-related topics, and in the mini-chat, you can chat on ANY topic (it's simply created for that).

And there's nothing wrong with people leaving (you just have to accept it). People grow up and don't have time for heroes anymore, and new people come in their place (Alexey, count how many people have come and how many have left, and you'll stop panicking about it)