I think it's a combination of the arc being pushed back due to the crossovers, and also Robbi Rodriguez has said he wants it to be his final arc before he retires, so maybe he wants to do as many issues as they can right beforehand.
They also have to resolve the whole Gwen *still* not having her powers back. Either right before it starts,or I have a feeling they're gonna do it so the Venom is how she gets her powers back permanently.