As Shave pointed out, I think it would be foolish to take anything posted here as a presumptive fact. As recently as OR, there were posts shared insinuating aspects of that ride as a virtual certainty, which turned out to be completely false (by a long shot, I might add), once the ride was completed.
Everything is speculative until an official announcement, or we see indisputable physical evidence to support it.
All that said, I have a few questions. First, is there a legitimate description used to categorize a "family" coaster? I've seen rides like Wild Eagle described as such, but in my book, a family coaster immediately takes me to a more tame ride built to accommodate a broader audience. For me, TNT and Fire Chaser are more legitimate "family" coasters.
Second, once track begins arriving, would seeing it alone give us the ability to discern whether or not this is a winged or dive coaster, or any other variety for that matter?
Lastly, why is anyone assuming the 2017 attraction is not a dive coaster, and that a dive coaster is coming in 2020? We don't even know what's being built as we speak, let alone what might be coming in three and a half years.