I am really looking forward to these. :-)
The first box (cuirassiers, dragoons and chevauxleger) won't now be released until the coronavirus lockdown ends or reduces, whenever that will be.
The second box (hussars) may happen at some point in 2021.
No plastic 28mm Austrian lancers are planned by Perry, though Victrix has just released its French Imperial Guard lancers, which might prove convertible into Austrian uniforms.