We've known for a while now that 19-year-old Tom Holland will make his debut as the new Peter Parker/Spider-Man in the upcoming film Captain America: Civil War.
New rumors stemming from Heroic Hollywood sources (and originally Hollywood Reporter) suggest Parker won't be the only character from Spider-Man making a cameo in the new Captain America. Apparently, Marisa Tomei, who is rumored to play Aunt May in the Spider-Man reboot, has already secretly shot her scenes for Captain America before production wrapped. If last week's report regarding furniture props of Peter Parker's bedroom are accurate, it's possible Tomei's cameo as Aunt May could occur in an at-home scene with Peter Parker.
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None of this has been confirmed, mind you, and probably won't be as Marvel likely wants to keep its plans a surprise.