Campagnolo will use a new freewheel body called N3W to allow sprocket smaller than 11t.
The N3W freehub has splines that are spaced like an existing Campagnolo freehub body but the length of the freehub body has been reduced by 4.4mm
The solution found by Campagnolo to fit sprockets smaller than 11t looks very similar to the Moulton proprietary freehub body, also derived from a Campagnolo freehub body, also shorter that also accepts sprockets of 10t.