Alright... you're new and enthusiastic. I think we have something of a duty to develop new players, for the benefit of the community in general.
At a quick glance... I need to ask some questions of your campaign... or game, perhaps.
From the cast of characters you list, you want players to stat up one of the Young Justice characters that's already on the list? No original characters?
Your second post seems to indicate that the players would be jumping into a situation that's in progress. To me, it looks like I need to already be aware of what's going on in the cartoon -which I'm not following. Is that accurate?
Finally... a Suggestion.
Based on your guerilla submission to Guild of the Bat, you probably need to see how things are done around here (the conventions we use, and the etiquette behind posting) before taking this on... also, your submission showed me that you have some gaps in rules knowledge. I'd focus on following games, submitting for games, and (hopefully) playing. Once you've been around a bit, and developed your understanding of the rules, you'll be better situated to actually step into GMing games.