Porsche's model lineup with the 911, Boxster/Cayman, Panamera and Cayenne will be expanded by 2013 to include a compact SUV.
In the same year, the company will add a limited series of the 918 Spyder hybrid, a 500-horsepower vehicle with a V8 engine and electric motors that has a top speed of 320 kilometers per hour.
Porsche may also develop a supercar positioned higher than the 237,600 euro 911 GT2 RS, which currently marks the top end of the 911 lineup, Maier said last month.
Additional variants of the Cayman and Boxster, plus extended-wheelbase and convertible versions of the four-door Panamera, are also conceivable, he added.
Last week, Volkswagen said it was sticking to plans to integrate Porsche's sports car business but was also "preparing for the eventuality that a resolution on the merger will not be adopted this year," adding it still sees the chances at 50:50.
Volkswagen said it remained committed to its goal of creating an integrated automotive group with Porsche, regardless of how it ultimately achieves it.
The Porsche SE holding company, which has its own CEO and CFO, will report after-tax results for the first half on Tuesday.
Sources: Reuters and Bloomberg, with contributions from David Jolley