If they do the split up I feel the the audience for a modern era would be more receptive. Still, though, there will be some members who complain they don't know the backstory but I feel the general majority will appreciate the opportunity to have it split up to catch them up more easily.
The only negative concerns I would have is if the people who are viewing the movie and watched the 80's and later 2000's version will view the movie was just a simple reboot without much future focus.
But, either way, I am excited to see this be developed and produced.