Haha, I'm behind on this. BCH was going to be AVA 28 days ago
https://memo.cash/post/938f468d41d133e839571673f238ae4280ecc8b8ed05524da2c7171b8dcc7017
The BCH devs are looking to see if Avalanche consensus can be used as a preconsensus for transactions. It just manages the mempool for miners to process transactions from.