The theming of the original EPCOT, yes. Just updated attractions...nope.
Horizons, Universe of Energy, Wonders of Life, World of Motion, and Imag with new updated scenes and animatronics but utilizing the same ride systems would not get people in the park. While I loved the original EPCOT, I'm also a realist. Take the original overall theme of EPCOT and build new "ground-up" attractions and you may have a shot. (As much as I hate to admit it, you may need to add a splash of character/IP to those attractions too.)
IMO there are only two IP attractions in EPCOT that I am ok with. That first attraction is Ratatouille. It's not perfect but at least it fits the area, is familiar with kids, and revolves around a French restaurant. How the ride actually was implemented is another story altogether but it's one IP attraction that doesn't completely feel shoe-horned in. The second attraction is Turtle Talk with Crush. That is 100% edutainment. It's a fun show and the kids get involved and learn answers to questions that they have. Now, I don't like the Nemo overlay as a whole, and I'd much prefer an updated SeaBase Alpha as an overall pavilion theme but Turtle Talk is a winner in my book.