Apparently these are being released next month, and is the first I've heard of them.

Wave 5 has Hot Rod, Classics Inferno & Victory Leo (which is likely to be able to combine with the Wave 1 Victory Saber model.

For those wondering...
Wave 1 - Gen1 Optimus, Classics Optimus, Victory Saber
Wave 2 - Ultra Magnus, Classics Jetfire, Prowl
Wave 3 - Ginrai/Powermaster Prime, God Bomber, Starscream
Wave 4 - Gaia Cross (six figures designed to combine like Gen1 LandCross)