A role-play based on the Crisis with Captain America as the thumbnail is paramount to sacrilege.
I would say that your best bet would be to start afresh with a new RP, if your goal is to actually create something with others rather than having it be a sounding board for your own work which is much more suited to something like Deviant Art. Or even posting in the Forums for feedback or suggestions for example.
I mean the main page is fairly lacking in any sort of draw to bring people in and your aim is a little too vague to be interesting. You often see success with stories following the next generation rather than simply having people replay adventures of existing characters since it allows them to explore their own ideas. The layout from something like
this is much more impressive.
There was a rather good RP a year or two back where they'd created an academy following the Marvel and DC realities being merged where Stark and Wayne pooled their resources to create it, with the setting itself being a few decades after that merge. Not saying simply re-hashing that would be the best but maybe creating a similar setting, perhaps having a group of people who are the next generation but are kept in a X-Factor type program and have broken free. Where the story becomes how they're trying to find their place in the world. If you've merged the realities then leave it fairly open, mark out a few core changes or interactions between major characters like Dr Strange working with Raven or Zatanna to help stabilise the reality merge. And then let people submit characters and if there's something likely to clash or cause friction you implement a list of things that aren't allowed.
Ideally you need to create the setting, and hint at what the plot may begin as in order to cultivate a wider audience.
Also, why do you purposefully make your font smaller? It's kinda painful to read without manually editing the CSS file first. Also if I seem overly critical it's more due to the sheer number of RPs of this kind that I've joined in hopes of something great only to watch far too many fail before they've even began. And I'm also not great with tone or subtlety