Nevermind this thread, it's content was disproven!

Games Halo 5: Guardians
1

Notice the armor that the pink Spartan is wearing, not the helmet but just the armor. Image is at top of Reddit post.

2

Lazy link

3

Uhh, that’s Mk IV… not an armor from Halo 3.

4

That’s the Mark IV Gen1 Armor.
It’s been out for quite a while.

5

Oh, haha, that’s right…

sorry about the incorrect information.