The phrase "a big introduction" is correct and usable in written English.
It can be used when referring to an introduction that is extensive or significant in size or importance.
Example: "The speaker began with a big introduction that captivated the audience's attention."
Alternatives: "a lengthy introduction" or "an extensive introduction".
Mercedes plans a big introduction in New York for its Bluetec diesel engine technology.
With Moyes having been appointed what seems like three years ago, we weren't really expecting the club or their new manager to bother with a big introduction.
And with five major companies supporting it — Macy's, Best Buy, Sports Authority and American Eagle Outfitters, along with the Simon Property Group, the prominent mall operator — it is getting a big introduction.
Nexon, which went public in December, also wants to be a prominent American player and is gearing up for a big introduction of Epic of the Three Kingdoms in 3D.
The company is planning a big introduction of a new line by Ms. Stewart next June, a few months after her scheduled release from prison, said Gael Towey, the creative director of Martha Stewart Living Omnimedia.
"He doesn't need a big introduction.
This time, company officials said, they have learned from their mistakes — most notably, a recognition that the Uniqlo (pronounced YOU-nee-klo) brand needed a bigger introduction in the United States.
Episode 20 will be a bigger introduction to Barry's world and these first episodes are really Barry coming to the "Arrow" world.
Ms. Leander, a former Elite model who was also Boo.com's marketing chief, hired Roman Coppola, Francis Ford Coppola's son, to direct the company's TV ads, featuring nerdy young people in urban chic clothing, which were part of a $42 million campaign for the big introduction.
But I have no regrets about introducing it slowly, because I saw with the tax credit system that Labour had, in my own surgeries, when you have a big bang introduction of these systems, sometime people's personal finances suffer badly and that is very unpleasant.
But it was a great introduction to the big times, as it were.
