But also the crossover with the Miles Morales book will most likely be going on at the same time as Absolute Carnage, so I doubt the tie-in will come from that either.
That's also coming directly from Comic Book's mouths, not Marvel, so it could easily be them assuming there will be Spider-Man tie-ins just because its a Venom/Carnage story. So we'll have to see, if there is gonna be a Spider-Man tie-in, I think I can be safe in saying it'll be its own standalone mini, just like whats happening with War Of The Realms right now.