I've been thinking that it would be cool if there is a PermissionCheckEvent in Bukkit, like the PermissionCheckEvent of BungeeCord.

But why?
With this Event is it possible to give permissions of unloaded plugins to a user, without inject or anything.
So is it very simple to handle permissions for a permissions plugin.

I don't know if this is possible, please excuse me if that's a bad idea/it's not possible.