Well in my opinion, a viral site is not suddenly gonna split the first 6 movies into 2 timelines. Especially with DOFP, there will be a couple of separate timelines due to time travel. And the viral site's timeline is not really essential, and as if we are gonna see that in the movie. There's probably more experimentation and test subjects to stop the mutants that happened before the original trilogy that we don't know of. This movie doesn't need to confuse its audience by telling us we have already seen 2 timelines all along even before DOFp starts rolling in theaters.