Following the launch of The New iPad, Apple is expected to launch next generation iPhone in WWDC’12. We do not know how Apple might call its next smartphone. It may be a simple "new iPhone" or perhaps continue the numbering and see an iPhone 5. Whatever its name is, Apple is trying to acquire domains that refer directly to their products, namely, the Cupertino giants are trying to grab control of the domain iPhone5.com. Their legal team filed a complaint with the WIPO (World Intellectual Property Organization ).
Currently, the website iPhone5.com is a humble forum launched in October 2010, right after the introduction of the iPhone 4.
Source – MacRumors