Since we're going to be exploring the Jungle of Venus I think an epic easter egg idea that should be implemented by Bungie is to create a rare occurrence where a enemy similar to The Predator is invisible and hunting down your fire team. Or maybe at night time have a Slenderman running around out there some where. Sasquatch would also be fun.
Bungie please take this into consideration :D
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A good easter egg for Venus would be an Easter Egg with [i][u]Venus[/u][/i] written on it with little Venuses on it.