Is'nt that basically the same costume (BB wears in the chopter) that he's worn since Portable Ops?
Also... kojima says GZ takes place before Phantom Pain segments (as evidenced by BB still having an arm, destruction of Mother Base, BB rescuing Kaz, and young Chico in early trailer).
But he says the hospital segment is the tutorial.
Sooo what is GZ? A flashback if the game starts out with amputee BB?
Maybe it prgresses like:
1. Tutorial in the hospital
2. Major cinema in hospital ending in cliffhanger
3. Flashback (9 years earlier) leading into GZ gameplay and rescue of Chico & Paz
4. XOF retaliation and destruction of Mother Base, Kaz & BB in hospital
5. Coma scene
6. Goes back to cliffhanger and hospital escape
7. Leads to Africa/Angola and dimond dogs jungle openworld main game