Let's face it:
If Canon can sell dozens of 24-70 Mark II to upgrade-willing people with sufficient funds, why would they give this lens away with the body people would also upgrade to? People will buy both lens and body anyway, at least those who can. The others have to settle with whatever fits their budget.
As a kind of entry-level full-frame kit I don't think this ideal package with the 24-70 Mark II as a kit lens will become a reality. This is why I voted for the 24-105mm to stay the kit lens. As a consequence Canon would not cannibalize their own sales.
I strongly recommend to imagine yourself being in Canon's position. They want to generate more revenue, not less.
Let's go through some example scenarios Canon Product Marketing may be contemplating:
1. Someone owns a crop body plus EF-S lenses. This kind of customer is quite likely to purchase a 5D + 24-105mm kit, if wanting to upgrade to full-frame
2. Someone owns a previous full-frame model and a 24-70 Mark I. This kind of customer may purchase either the new 5D body only or may even be contemplating to pick up the 24-105 as a kit lens, thinking it may be a nice addition for a slightly reduced price.
3. Someone owns a previous 5D and 24-70 Mark I seeking to upgrade both to the newest model. In most cases I expect this kind of customer will eventually spend the money on both the new 5D body and the new 24-70 Mark II lens. There won't be any cheap option to upgrade, if you are in this group, because according to market analysis this will be exactly the group, where Canon expects people to have both a strong desire for upgrades and the necessary funds available.
Sorry in case I may have shattered someone's dreams for an idealized upgrade scenario. I dare say it is not likely to happen.