I'm tired of people saying they wanna have Chief find" gray team" or other Spartans in the game.
Now I know that Chief isn't the last spartan, but he IS the last known one. And that added to the effect of total epicness. Knowing that if you die, no one else can take your place, and humanity will probably be doomed was one of the reason that made Halo. 1-3 so great. Adding more Spartans to the mix will take away that feeling.
Also, finding more Spartans would make it feel like Halo Reach and Halo wars where.Spartans are disposable.
What do you think?