The last response about the roadmap (less than two months ago) was this.
My interpretation would be that yes there will be a new JH8XXX SoC (and SBC’s based around that SoC), but only when there are enough large customers in their finical books with preorders to make it economically viable. They need to spend about a million to spin a new design to silicon in a fab, if there is a major design flaw that could mean a respin at the same cost again. To avoid a costly respin, one time programmable chicken bits are used (A chicken bit, is a bit on a chip that can be used by the designer to disable one of the features of the chip if it proves faulty or negatively impacts performance).
The other side of the equation is time, fabs are busy and booking a slot to have your silicon produced can be expensive in terms of time and money. It can easily take two years from wanting a new SoC to holding a new prototype from a fab in your hand. Companies can pay a lot more to skip some of the queue at the fabs, but that means they have to sell their SoC’s at a much higher price point.
And the last part of why so little information is publically available directly about future products is the Osborne effect. If there was a new SoC available next month, it would have began its journey at least 2-3 years ago, probably even longer. Announcing it before it is ready to ship would kill almost all sales of products based around the JH7110.