Sorry One Direction, but One Direction are keeping their name.
In an Australian interview (viewable here), 1D funster Zayn Malik adamantly declared "No!" in response to a question about whether a legal challenge would mean the group would have to retitle themselves a la Little Mix, Liberty X, The Reason 4 etc.
"We're not changing our name," he went on. "We don't have any idea [what's happening] but we're not changing our name".
We're no lawyers but "we don't have any idea" doesn't sound completely legally binding. Mind you, what Zayn says goes, right? Right.