S.H. Figuarts Ginyu, Goku (Kaioken Ver.)
 

Now confirmed for release: Kaioken Goku is a June release followed by Ginyu in July. These images from Shonen Jump Magazine show off a few accessories, the most interesting being a Namekian Dragonball included with Ginyu. This to me says there are quite a few Namek-themed releases ahead to include the rest with.

The Ginyu Force themselves of course, which would cover 4-5 (depends if Guldo is a separate release or not) but that's still a few short. First form Frieza is long overdue, maybe Zarbon and Dodoria also?

https://i.imgur.com/L9O7r75.jpg

https://i.imgur.com/2iiePHF.jpg