Well as my friends and I were patrolling Mars in the area that you start the Valus strike, a pack of wolves started prowling and we thought the game was glitched. Turns out they were actually there, in light level 190 form.
No clue why they spawned because bungie said they removed the wolves for now, but maybe they are part of the story?
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IF you are actually near where they spawn in you can see they aren't dropped out of a ship, they simply glitch into existence when the Fallen Wolves are Prowling message comes up. Plus if you kill them all you don't get any grimoire score for killing the arcon priest that spawns and there is no chest. From this I conclude that they are a glitch that wasn't supposed to be in the game yet.