To some extent I think that was always an early aim of Creative Commons. I don't think Creative Commons ever saw their job as being a charity owner of IP, but they certainly tried their best to provide as many tools as possible to liberate IP and patents to either copyleft or the public domain (CC0) as they could.
I could certainly imagine an alternate future that if CC got enough donations to back a big enough budget they could help pay for lawyers to full time help creators claw back IPs from major corporations with the hopes to CC or CC0 license the rights that they win back. I also imagine that would cost a lot of money and that hypothetical arm of CC would need a huge budget to win the legal fights it would want to take on.
I could certainly imagine an alternate future that if CC got enough donations to back a big enough budget they could help pay for lawyers to full time help creators claw back IPs from major corporations with the hopes to CC or CC0 license the rights that they win back. I also imagine that would cost a lot of money and that hypothetical arm of CC would need a huge budget to win the legal fights it would want to take on.