According to Cinema Blend on Jan. 30, "Iron Man 3" will lead into "Guardians of the Galaxy". Marvel has spent years mapping out the Marvel Cinematic Universe by carefully tying in the solo based movies to "The Avengers" and it appears there are some hints as to what might occur at the end of the "Iron Man 3" movie flick.
First of all, it was revealed at Yahoo news that "Iron Man 3" toy designs seem to reveal the different suits designed my Stark Industries. By the looks of one of the designs, it appears that Iron Man has a "deep space suit" allows him to survive his trip into space. Since the "Guardians of the Galaxy" tend to inhabit that realm, it does give clue that Stark may encounter them on their home turf. So anyone who is browsing Wal-Mart lately, avoid the toy section if you want to stay away from spoilers.
Considering that "Guardians of the Galaxy" opening day is in 2014, this would be quite an early appearance for them. There is reason for this and it's more than likely to get non-comic book fans familiar with characters they don't recognize. And what better way to introduce the audience to the "Guardians of the Galaxy" than through the renowned Tony Stark?