You have to purchase the extended norms separately for the SBV, unlike the WISC. Also, HMH-Riverside is heavily promoting the rollout of the WJIV this year, so I imagine the SB6 can't be out any earlier than next year. You may have encountered people involved in standardization, which usually finishes about a year before publication.
And, BTW, it is possible to derive predicted achievement from the SB to the WJ, if you want to know if the achievement scores are comparable to the cognitive. A few points difference is generally not a big deal.
