Thanks to Reynolds Cycling’s crew and the Pivot Cycles Facebook page, we got these pics of the Pivot Factory Team trying out their new 650B DH bikes with those prototype Reynolds Black Label DH wheels.
The design departs from the current Phoenix DH by putting the shock in a horizontal position, being compressed toward the head tube. This mimics virtually all of Pivot’s bikes, save for the Firebird 27.5 introduced last spring. It should make for a drastically simpler seat tube and bottom bracket junction, though the seat tube is still heavily formed to accommodate the DW Link movement.
Speaking of the links, this new design does away with the upper rocker arm, instead driving the shock directly from the upper linkage. You can see how the pivots are placed in this post on the Mach 6, but positioning is likely tweaked for this bike.