When Does "The Marvels Project" #3 (2009) Take Place?
"The Marvels Project" #3 "Part Three" is a historical fiction superhero comic-book written by Ed Brubaker that released October 14th, 2009. So when is "The Marvels Project" #3 set?
It takes place on the fictional Marvel Universe timeline in the year:
We know this because the Coney Island Cyclone roller coaster appears being used. This amusement park ride first opened to the public on June 26th, 1927 so it must be after June of 1927 AD.

1940 AD
We know this because the Coney Island Cyclone roller coaster appears being used. This amusement park ride first opened to the public on June 26th, 1927 so it must be after June of 1927 AD.
Furthermore, almost halfway through the issue the narrator tells us, ..."the New York docks in 1940 were a fog of corruption, mob violence, and shady characters."
More specifically, the very first textbox on the first page narrates to us, that "Summer hit New York in 1940 almost without warning." So it is presumably summer of 1940 AD.
It is a chronologically midway comic in the Marvel Comics Universe multiverse timeline and can be read at its timeline point after the previous issue, "The Marvels Project" #2 (2009) and before "Marvel Mystery Comics" #8 (1940).