This theory does a great deal to explain an issue I had with the mission to capture Skolas.
If he pulled all those House of Wolves troops from their respective timelines (presumably mostly from the past), then a lot of Fallen were killed by our hands before they could fight in the battles they were supposed to.
This would in turn lead to a cascading series of events being altered due to a large amount of Fallen troops being absent when needed. The war they waged on the Reef in past may not have been a real issue for the Awoken in the wake of these changes to time.
This way, however, since he was using Vex tech that he barely understood, he could have been pulling the House of Wolves from other timelines rather than from his own 'local' past, thus horribly maiming some other worlds' natural orders of events, but leaving our own unaltered.
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There's also the timeline split theory which states that any changes made to a given timeline will split off into a whole new timeline. But even with that one there'd be a few paradoxes, especially with the wolves.