Macquarie Research has suggested that Nintendo will show new Wii Fit, Mario and Zelda titles at E3 next week.
The company also repeated long-running expectations for a redesigned PSP from Sony, and Xbox 360 motion controller technology from Microsoft at the annual industry showcase.
"We understand Wii Fit Plus will be launched at E3, which will be sold separately from the board and in a bundle and will capitalise on the 17 million existing Wii Fit users," said the firm.
"We expect Nintendo to learn its lessons from last year and provide more gamer-centric announcements at E3 such as a new Zelda or Mario title for the Wii (in addition to the new Zelda for DS). We do not expect a price cut and see an outside chance that new accessories for Wii could be announced," added the company.
The research firm said that a new PSP model, also expected to be revealed next week, may be too highly priced for the market.
"We don't think this will be well received, but we are worried the pricing might be well above the existing model's USD 199 price point.
"No price cut for PS3 is expected, but we think it likely the slimmer model is announced at the same current price of USD 399 and with a price cut of USD 100 closer to the holiday season," added Macquarie.
Nintendo's E3 pres conference will take place on Tuesday June 2 and will be hosted by Nintendo US president Reggie Fils-Aime, executive VP of sales Cammie Dunaway and global president Satoru Iwata.