Johnson is an S1...Just no armor...thats my pipe dream and im sticking to it
Spartan I's didn't have armor. The MJOLNIR project was developed specifically for the S-IIs.
Also, you may not care about the S-Is, but I do, cause they're still everywhere, alive and fighting.
Johnson most likely is one, and if ilovebees is canon, there's Gilly, Gladys, and one other S-I (I don't remember his name) still on Earth.
Also, was Grey Team the three other Spartans that were 'too far to be recalled easily?'
Last thing, I promise. If the other Spartans do show up in Halo 3, that means MC and the Arbiter are in the Dyson Sphere, and that means Earth is pretty much screwed.