zedreamcast
Member
Honestly it doesnt matter if you have a similar setting or plot. Its the excecution that matters.Ic. Well, you might want to check out those series I mentioned just to see if they are similar to your idea. They are also good series to read too.
There's several arcs like that in a manga called Franken Fran. Guy becomes super hero and kinda goes nutz and doesn't save people and only kills the bad guys.
Edit: I feel like i'm ruining everyone's fun by telling them "oh, it's been done. Here's the series." Oh well. At least my knowledge of manga is being put into use.. for once.
look at bleach its basically Yu Yu Hakashou except Yu Yu Hakashou is good.