SAN FRANCISCO (MarketWatch) - Some Wall Street analysts are expressing doubt that billionaire activist investor Carl Icahn would be successful in putting Yahoo back into merger talks with Microsoft if he decides to mount a proxy battle for control of the Web portal's board.

With the Google-DoubleClick merger wrapped up, Yahoo may face even greater pressure to find itself a buyout partner, according to Wall Street analysts and investors.

Everyone from Wall Street analysts to former employees to advertising firms seems to know just what struggling Internet pioneer Yahoo should do to turn itself around. Each "solution" is a doozy: Lay off hundreds or even thousands of employees. Get out of the search ad business and just use Google. Sell out completely to Microsoft.