I think if they model it in the same manner as Arrow, then it will be successful. Also, they need to have them both on the same night. Don't wanna see any vampire crap on the same night.
Check out the pilot for my webshow WISHFUL THINKING. It is a show about a college student who fucks up his day and a Genie grants him the opportunity to do it all over again and he finds new and creative ways to fuck it up even more.