Lazard Capital Markets analyst Colin Sebastian has told Edge-Online that Nintendo’s underwhelming first party software lineup has opened up a window of opportunity for third-party publishers looking to capture Wii and DS market share.

Sebastian said that publishers EA and Ubisoft were most likely to benefit from Nintendo’s lack of “blockbuster title announcements” at this year’s E3 Media and Business Summit.

“I think Nintendo may be giving the software publishers a window of opportunity, probably a few quarters, where third-party games may be higher profile in stores,” he said.

“I also think part of it may be simply where we are in the development cycle for Nintendo first-party titles.”

Nintendo lifted the curtain on a number of new first-party titles during its E3 conference last week. Its lineup was headed by Wii Music and Animal Crossing: City Folk, both of which will hit shelves in time for the holiday season, and Wii Sports Resort, which will be released next spring. A new Pokemon Ranger DS sequel was also announced.

However, the company’s conference also focused on non-Nintendo offerings for the Wii and DS, with NOA president Reggie Fils-Aime saying that third-parties were beginning to find real success on Nintendo platforms. EA’s Spore Creatures for DS was shown off, along with a new Raving Rabbids title from Ubisoft for Wii, and Guitar Hero: On Tour Decades and Call of Duty: World at War, both from Activision.

“From what I see, Ubisoft and EA appear to be most aggressive on building Nintendo market share,” Sebastian added, citing the former’s Shaun White Snowboarding: Road Trip (pictured), which will utilize the Wii Balance Board, in addition to its Imagine and Petz lines, and the latter’s Skate It and All Play sports titles.

Speaking to VentureBeat about Nintendo’s E3 offerings, EA CEO John Riccitiello also said that Nintendo had left the door open for third-parties to grow their Wii and DS market share.

“Frankly, if you look at Nintendo, it’s obvious there is a chance for third-party success,” he said. “They didn’t show a lot of content from Nintendo’s first-party group. They got a lot of that out last year. So third-party games will likely do better.”