I'm trying to think about it without getting a headache, but I almost feel like Arrow could go uninterrupted by it. I mean, wouldn't we be seeing the timeline from Barry's POV? It's not like the whole world changes, just the one that surrounds Barry. Sure we could see him visit Oliver, just to find out Malcolm's wife never died, and the Queen's gambit never sank, so Oliver stood in his life, went on to marry Laurel, or left her to be with Sara, and never became the Green Arrow, thus meaning Team Arrow never existed. That would be cool to see too, but it would have to be a crossover then. It wouldn't work on Arrow if you don't have the context of what happened on Flash, because they still need to address the audience that doesn't watch both shows.