Warning: The following contains SPOILERS for The Flash season 8.
A new theory suggests that the time virus at the heart of one storyline in The Flash could transform Iris West-Allen into a villain. If true, this theory could force Barry Allen to face his greatest struggle ever, pressing the Paragon of Love to sacrifice the love of his life for the good of the Arrowverse. This would also be an ironic echo to the end of the Armageddon event that opened The Flash season 8, where Barry refused to make a similar decision regarding the death of his worst enemy.
The strange time sickness which plagued Iris previously only caused her to experience lost time, hallucinations of alternate timelines, and uneasy feelings. Shockingly, the disease progressed to the point that it began disintegrating objects around Iris, without her being aware of it. This culminated in Iris accidentally erasing Renee Wazzo from reality, shortly after reuniting the woman with her long-lost daughter Tinya.
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It's possible that the objects and people seemingly destroyed by Iris and her time sickness still exist somewhere and might be restored. However, Iris still remains a danger to herself and others and it is possible that the shock of what has happened could push her over the edge, like many other Central City metahumans who were corrupted by their powers. While this chain of events may seem unlikely, it would make for an interesting and unexpected finale to The Flash season 8.
Iris' time sickness was introduced in The Flash season 7, episode 16, «P.O.W.,» at the height of the Godspeed War story arc. In the middle of the fighting, Barry Allen was briefly taken out of time by
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