Before the bell: Stocks look for a slightly higher start

U.S. stock futures were slightly higher ahead of the opening bell Tuesday, as investors awaited economic reports on consumer confidence.
Theres's still a lot of uncertainty in the market, between spreading urest in Libya and the Middle East, as well as Japan's recovery efforts and nuclear issues.

Companies: Shares of BP (BP) fell 2.5% in premarket trading after analysts at Collins Stewart reportedly downgraded the stock on concerns about its joint-venture with Russian oil and gas company Rosneft.
BP was also under pressure following a report that federal prosecutors are considering whether to pursue manslaughter charges against company managers for decisions made before the Deepwater Horizon oil rig exploded and killed 11 workers last year.
Apollo Group (APOL) was under pressure, with shares falling nearly 8% in premarket trading after the education provider lowered its outlook.
Shares of Lennar Corp (LEN) rose nearly 3%, after the homebuilder swung to a profit in the first quarter.
News Corp (NWS, Fortune 500) was also in focus amid speculation that the publishing company is in talks to hand over control of Myspace to Vevo.com, the online music website.
Economy: US data starts at 1400GMT, when Conference Board consumer confidence is expected to fall to an index reading of 64.0 in March after jumping to a three-year high in February.