Android L until this time is still mysterious. Most people guess what name will be used on the version 5.0 Android. But it is ensured that that the name will be preceded by letter L.
In android world, a name can be such great news, moreover there is a video uploaded by Sundar Pichai who is the Senior Vice President in the section Android, Chrome and Google Apps. He is an important man in the company.
In fact, he is the one who will announce the name of the new android later.