At the very beginning of this year, Gap (NYSE: GPS) decided to drop $130 million to pick up a little chain of stores called Intermix. The brand has only 32 locations in North America and no international footprint. It sits well outside Gap's other brands, offering $2,000 dresses and jeans for hundreds of dollars.

Gap is expecting good things from Intermix, though. The brand has very little online presence and no international offerings. Last week, management highlighted the potential for Intermix, no doubt hoping to capitalize on some of the success that Michael Kors (NYSE: KORS) has seen recently.

High-end, high-margin
In its first foray into high fashion, Gap decided to purchase a non-designer. Intermix doesn't make its own clothing; it's a boutique for other designers. That means that Gap was able to get into the business without having to acquire excess production and design capabilities. The boutiques don't carry Kors but do have offerings from designers such as Jimmy Choo and Fendi.

While the product offering is similar to Kors', the operating model is closer to The Buckle's. Buckle also carries other brands -- though there is a Buckle line. The company used that middleman status to run a 27% operating margin last quarter. Gap would love to have that pulling its operating margin up, as last year it managed only 12%.

The competition
Kors isn't going to go quietly along with Gap's growth plan, though. The company has been pushing sales up at a crazy pace over the past nine months. Comparable sales are up 41% across the brand, and total revenue was up 71%. Kors' brand strength has never been higher, and it's quickly becoming the go-to brand for big names.

If Intermix wants to compete, Gap is going to have to scale up quickly and expansively. Thirty-two locations can't compete with Kors' 388 stores. But even if Gap can't beat Kors, it still has a chance to break into a profitable new market. High-end customers have bounced back faster than Middle America from the crisis, and sales at many luxury stores have been strong.

If Intermix can tap into that segment, it should be able to help generate extra cash for Gap and bring that operating margin up slightly. That will give the company more room to run with its secondary brands, such as Athleta.

In the next three years, as Intermix speeds up and Kors slows down, the fight is going to get hotter. Be on the lookout for an Intermix near you soon, and watch Kors' margins to see whether the company has to dip into discounting to fight off the new threat from Gap.

Michael Kors is one of today's hottest high-end fashion brands, and that's translated into one of the best-performing stocks in retail -- since its debut on the market in late 2011, the share price has more than doubled. But with all that growth, has the stock finally become too expensive, or is there still room left to run? The Motley Fool's new premium report on Michael Kors gives investors all the information they need to make the right decision. We cover the key must-watch areas, opportunities, and threats to the company that investors need to know. To claim your copy, simply click here now for instant access.

Fool contributor Andrew Marder owns shares of The Buckle. The Motley Fool recommends and owns shares of The Buckle. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.