Nowadays, the easiest way to get something like this done is via a kickstarter project.
You're serious about an Enhanced Edition, you think TW3 shall have an Enhanced Edition. Get in touch with CDPR, ask them how much it would cost them, in their opinion, to release an Enhanced Edition, define objectives for support threshold (what do you want done for 100 000€, 200 000€, 300 000€ [...]), review this with them, and launch it.
CDPR is a serious company, but they are investing their time in Cyberpunk 2077 now, along with TW3 extension. Like any company, they have resources (investment) that they use to the best of their ability. Bring fresh amount of money, and they will be able to reinforce staff and get things done.
Now, are we ready to get there ? I certainly am, but this is gonna take more than my money and a poll to get it done