Like Shin Taishiji Dom, no new parts added to the content.
Backpack is able to snap onto the wing unit of the already released Shin Gurensou Sousou Gundam perfectly.
Comparison with the manga version (left, painted) and manga Kibutei boxset version (right).
August 26th release, 630 Yen (inclusive of tax).
Images are from Nintendo World BBS.