reaches past these ghosts (джен)

“What do you mean, you don’t have the Tesseract?” Rogers asked, his voice surprisingly calm under the circumstances. During their admittedly brief acquaintance Natasha had come to the conclusion that he found everything equally outlandish and couldn’t be shaken by aliens – gods – whatever – anymore than by the Helicarrier, cell phones, or the fact that the year was 2012. “What happened to it?”
Loki frowned at him for a moment, then shrugged and said, “As best as my brother and I can guess, my counterpart from an apparently unpleasant future and those of you and your lovely lady friend there traveled through time, stole the Tesseract and the scepter, and decamped back to their own time.”
 
One possibility for what happened in 2012 after Natasha, Steve, and Loki left in Chapter 3 of On Yonder Hill.