My interest in this show just dropped another notch.
If there's even a remote chance that I'll have to subscribe to the digital comic to get the whole story of what's going on in the show, then I may as well not even invest any time in watching it at all.
I really don't think that's going to be the case at all. It's more of a deal of providing more Arrow for fans who will want to buy digital comics or comics instead of not telling the full story on the TV series. It looks like it's going to be extra stuff, like a lot of media tie-in fiction.
Though perhaps the digital series can provide more back story or bridge episodes or series, providing an incentive for the show's fans to read them, but even if they did that I don't think it's going to hamper what the show is doing. I do think a digital prequel would be a cool idea, or something between seasons.