^
CBS will at least show the first episode on their network before shifting it to All Access, at least that was the plan before. But there's been changes behind-the-scenes and maybe that will change too. It does suck that it's going to be on All Access. I'm not buying that and I'll just wait to watch the show when it comes to DVD.
Discovery's continuity will be in the Prime Universe with the rest of the television shows. It will not be in the JJ Abrams continuity, which is called the Kelvin Timeline/Universe. Unfortunately I don't know how they are going to fit in the original cast because Discovery is set ten years before the original series. I mean we could see younger versions of Kirk, Spock, McCoy, and also Sarek and Spock's mom, but I can't see how they will bring back the original actors playing the same original characters. Of course they could play new characters but that takes away some of the fun. And I could see maybe at least two characters from ENT still surviving to cameo on Discovery (T'Pol and Phlox).