Re: Captain America: The First Avenger-Review, Discuss, Grade, Sequel,
I've seen nothing to indicate that the agent Steve saw in the present was meant to be Sharon. It's perhaps implied that it was, but more likely they got someone that resembled her enough to greet him when he awoke. I wouldn't be surprised if it was Sharon.
I'm pretty sure there was an article in the "Avengers" thread that stated Sharon along with a whole slew of other Shield agents including Abigail Brand would be in "Avengers".
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Ignoring the The Last Stand since 2011.