In 'What's Ahead on Wall Street' for Tuesday March 29, we're focusing on earnings from two big companies. In the morning, we have Lennar (LEN) - Get Report reporting, followed by Dave & Buster's (PLAY) - Get Report in the afternoon. Lennar's results are important since they'll shine light on the housing market. For the latest quarter, Wall Street is looking for earnings of $0.52 a share on revenue of nearly $2 billion. Both the top and bottom line are expected to increase from a year ago, boosted by higher selling prices and strong volume trends. But its gross margins will likely be impacted by rising land and construction cost. On the economic calendar, we have Fed governor John Williams giving a speech early in Singapore followed by the S&P Case-Shiller home price index at 9 a.m. Eastern. Shortly thereafter, we have the consumer confidence and later that morning, Janet Yellen is set to speak in New York. TheStreet's U-Jin Lee reports from Wall Street.