More pieces of this puzzle are slowly falling into place. Major Spoilers lie ahead, so proceed with caution. But know, most of this information has been revealed already in the plot synopsis released on The Amazing Spider-Man Official site.

Earlier today, we reported on a character cameo rumor that puts Peter Parker as The Amazing Spider-Man appearing in Marvel's the Avengers. This particular rumor seemed unlikely for a variety of reasons. The main one being that different studios own the film rights to both franchise properties. But now, a more detailed plot synopsis for The Amazing Spider-Man makes this rumor seems a little more likely (not much, though), especially if you know your Spider-man history.

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Andrew Garfield and Emma Stone are currently touring the world with a couple of producers on The Amazing Spider-Man, offering a sneak peek at seven minutes of footage, followed by a Q & A session. As they visit India, a new story synopsis has surfaced, which gives us a little more background on the full story being told in the film.

This is the plot rundown as released by The Times of India

Amazing Spider-Man briefcase photo
"The Amazing Spider-Man is the story of Peter Parker (Andrew Garfield), an outcast high schooler who was abandoned by his parents as a boy, leaving him to be raised by his Uncle Ben (Martin Sheen) and Aunt May (Sally Field). Like most teenagers, Peter is trying to figure out who he is and how he got to be the person he is today. Peter is also finding his way with his first high school crush, Gwen Stacy (Emma Stone), and together, they struggle with love, commitment, and secrets. As Peter discovers a mysterious briefcase that belonged to his father, he begins a quest to understand his parents' disappearance - leading him directly to Oscorp and the lab of Dr Curt Connors (Rhys Ifans), his father's former partner. As Spider-Man is set on a collision course with Connors' alter-ego, The Lizard, Peter will make life-altering choices to use his powers and shape his destiny to become a hero."

The interesting thing about this plot synopsis that hasn't yet been revealed is that Peter Parker is propelled on this quest after finding a briefcase that once belonged to his father that ties into a mystery at Oscorp.

As some have pointed out in the comment section of the Marvel's the Avengers cameo rumor story, and as we've noted in the past, official Marvel lore has Peter's parents, Richard and Mary, dying in a plane crash as agents of S.H.I.E.L.D. As seen in the above photo from The Amazing Spider-Man Official site, which also includes a photo of Peter's parents not looking much different from their S.H.I.E.L.D. incarnation in "Untold Tales of Spider-Man" #1 (you kind of have to squint to see them), this briefcase is playing a central part in the overall plot. As the driving force behind bringing Spider-Man back to the big screen seems to be the story behind Richard and Mary, its actually quite likely that there will be a Spider-Man cameo in Marvel's the Avengers if they at all plan to stay true to the history of the comic books.

It seems like a win-win for both studios. If Spider-man is in Marvel's the Avengers, then The Amazing Spider-Man will get to reference S.H.I.E.L.D. Either that, or Richard and Mary worked for some pseudo company. Which will be fine for most audience members to accept, I'm guessing.

What we could be seeing here is a slow merge of all Marvel properties on-screen. Who knows, maybe next we'll hear about Wolverine being in Marvel's the Avengers (though, rest assured, 20th Century Fox would never allow that to happen).