I am not sure how studios could set guidelines for fundraising based on funding paradigms that are evolving. The guidelines would be end-arounded at some point.
I don't think the "abandoned IP" argument washes; just look at all the rebooting going on.
The only solution I can see is studios vetting proposals one by one, with "guidelines" being the starting point for discussion.
Things relevant to new media are changing too quickly to be anticipated 100% by guidelines.
I give Axanar Productions credit for recognizing that this rising technical ability will create potential new content providers for networks.
I give Axanar Productions the razzie for trying to prove this and position themselves ahead of the pack by walking all over their potential customers (the studios) and donor fans when Axanar couldn't get the studios to accept a pitch from a company with almost no bench capable of making the vision happen (August podcast, their plans and their frustration they couldn't get CBS to buy in to the company as a future content source).
If you want to sell your idea you need to assemble the ability to do it (technical and management and industry knowledge, not just a green screen), and not make yourself untouchable (poor decisions, badmouthing, poor business admin, etc.) in the target industry in the process.