It looks like Phone Arena has a screen shot of Verizon's upcoming family data plan. The pic depicts a planner so that the subscribers can decide just how much data they need. Sorry, but I reckon this is the start of a new "family feud" once the new data plans go into effect.
Personally, I'll never be able to share. I'm a data hog and I freely admit it. I think it's for some families. Definitely not mine. Can you imagine your little ones taking all the data playing games and videos? Yeah, not good for the pocketbook. Maybe the grandparents won't use their data allotment.