Coinbase just updated their blog post with new detailed information on how they will manage the upcoming forks.
Bitcoin will still be listed as BTC
Segwit2x will be listed as B2X
Meaning: Coinbase no longer believes that B2X will became bitcoin.
https://blog.coinbase.com/timeline-and-support-bitcoin-segwit2x-and-bitcoin-gold-eda72525efd
By Daniel Campos
www.coinspages.com