This show will flow right into TOS. It won't be a flawlessly smooth flow, but then TOS doesn't flow flawlessly into its movies and those movies don't connect perfectly with the TNG Era and beyond. And ENT? That series was considered the greatest crime against Trek canon in its history when it was on the air. But it has logical connections to DSC, SNW and TOS and they're all part of the same timeline even if some fans refuse to believe it.