Three highly trained Shield agents are rumored to appear in season 2 of Marvel's Agents of S.H.I.E.L.D.

According to reports from Den of Geeks, Agents of S.H.I.E.L.D. creators Joss and Jed Whedon pitched in an idea of having characters from the Avengers to guest star in the new episodes in season 2. Jed hinted that these characters are well renowned Shield agents and fans have speculated that these characters are none other than Black Widow/Natasha Romanov and Hawkeye/Clint Barton.

Several comic book fans wanted to see Hawkeye in the show to explain his absents during HYDRA'S takeover of S.H.I.E.L.D. in season 1.

But these two aren't the only characters to make an appearance in season 2. Peggy Carter's daughter Sharon Carter is also rumored to join Agents of S.H.I.E.L.D. and is hinted to be a series regular. Sharon Carter first appeared in Captain America: The Winter Soldier played by Emily VanCamp.

So far, there is no confirmation yet these three agents will guest star in the show, but the possibilities are limitless.

Meanwhile, a cast member from Agents of S.H.I.E.L.D. will make a surprise cameo in the Avengers sequel, Avengers: Age of Ultron.

According to reports from Cinemablend, B.J. Britt's character Agent Antoine Triplett will appear in Avengers: Age of Ultron as a photo of him was uploaded a blogger named Little Laura during shoot in the University of East Anglia campus in Norwich, UK.

Will Black Widow, Hawkeye and Sharon Carter appear in Agents of S.H.I.E.L.D. season 2?