According to the official description, this is the "final" evolution of the Build Strike, but we'll believe that in maybe 20 years.

Anyway, the Build Strike variant from the fifth episode of Build Fighters Battlogue has joined the HGBF series! It comes with a completely new backpack that can have several configurations allowing you to choose between 5 or 12 wings, giving this a particularly Seed Destiny feel! The head, shoulders, chest, and legs also have new parts that give the suit a bulkier appearance upon completion!

GUNDAM - HG - GUNDAM BUILD FIGHTERS - BUILD STRIKE GALAXY COSMOS 1/144 - HIGH GRADE is categorised MANGA / MODEL KITS / 1:144 SCALE and sold by l'Imaginaire, a store and specialised website.