I'm not sure if Halo takes place before Destiny, but even if it doesn't, I would love to see a warthog, a scorpion, or even a mongoose in the game just for kicks.
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References to past Bungie games is great and all, but Destiny takes place in a completely separate universe than that of the Halo series, and probably never had a UNSC (at least, not in the form that we understand it from Halo).