Are Headbringer (Iguazu Melander C3), Cannonhead (Volta Tiang Qiang with tank legs) and maybe VP-40 the most likely candidates to get merchandised for the Bandai's 30MM line?

Headbringer, Cannonhead and Locksmith all have acrylic stands so they are considered as major characters.

Tian Qiang mould they could release vanilla version and Cannonhead variant.

Melander C3 could release Headbringer and Tenderfoot, not sure if they will make vanilla as it is too similar to HD-11 Melander.

It will be hard to fathom if they don't release both Cannonhead and Headbringer.

Locksmith requires a VP-40 and head and legs of HD-11 Melander. Head and legs are always on separate runners. A vanilla VP-40 and a Locksmith release could be likely.

Mixing vanilla VP-4 and Melander parts could produce many custom variants that builders could paint themselves.

Firmeza mould for the RLF characters if lucky.