Absolutely not. Although I wouldnt count Bungie out....they always like surprises. I'm saying no because whenever Halo is mentioned in a Bungie interview they (Bungie) always stress how they've moved past that now and are onto bigger and better things. Having anything that links them backwards I feel like would hold them back. Bungie wants to find out if they can make something bigger than Halo (as stated in the vidoc) , and including references in Destiny to it wouldnt really show that.