How will US mega-merger affect alliances?

Mega-carrier would shift to American’s own alliance

The oneworld alliance is expected to get a strong boost with the imminent $11 billion merger between American Airlines and US Airways as the resulting mega-carrier shifts to American’s own alliance. Reuters reports that this would be “part of a comeback by oneworld, which has lost members and fallen behind rivals Star Alliance and SkyTeam in recent years”. US Airways would leave Star Alliance and join oneworld as part of the deal, according to sources.
The oneworld alliance is currently trying to plug holes in its worldwide network, in particular by securing a Chinese member.
The merger between American Airlines and US Airways will create the world’s biggest airline by passenger traffic, helping the two embattled carriers to compete with rivals such as United (Star Alliance) and Delta (SkyTeam).