Ok, so given how I hadn't read comics for years upon years, I'm not all too familiar with the reason for the separate Action/Detective comics and the Superman/Batman ones.
Why is they hadn't just done Rebirth and then continued the respective stories of Supes & Bats in the Action & Detective comics, why do they have these as well as their own ones ongoing and how is the continuity between them?
...basically, what exactly is the deal?