It's a simple and very elegant ending.
Read this paragraph from A123 website:
"Receiving Court approval of our asset purchase agreement with Wanxiang and Navitas is an important step toward finalizing the sale of A123's assets, and we are now focused on CFIUS approval of the sale to Wanxiang, which we are confident that we will receive given the structure of this transaction," said Dave Vieau, Chief Executive Officer of A123. "We believe an acquisition by Wanxiang will provide A123 with the financial support necessary to strengthen our competitive position in the global vehicle electrification, grid energy storage and other markets, and we look forward to completing the sale."
What this means is that A123 will be a company that's owned by Wanxiang. It will continue to operate as A123 but with a new daddy. This sugar daddy will infuse lots of cash into it and eventually bring it out of BK.
My guess is that the shares will not be cancelled.