Privacy build into Bitcoin (BCH).

Hi folks, I'm just wondering if any studies have been conducted, or if anyone has looked into whether privacy could be built into Bitcoin (BCH). By privacy, I mean Monero level privacy at the base layer. I know we have Cash Fusion, but it's not integrated at the protocol level. I'm curious to find out if it's a monumental task to achieve this with Bitcoin, now that it's already up and running. I realise this isn't going to happen any time soon; however, I'm just interested to see if it has actually been mapped out by some sort of software wizard.