They mentioned gjallerhorn in the musical episode. When the reds were singing about rocket launcher names.

While that would be [b]awesome [/b]!!!! I don't think Rooster Teeth can do it since one of the reasons they're able to continue Red vs Blue at all is because they got Microsoft's support. If they were to do a Destiny machinima just like RvB, there would likely be conflict between Microsoft and Activision (and indirectly Sony as well). That being said, it's not like they haven't made skits, and let's-play's involving Destiny before.