I’m thinking we’d need new physics discoveries. Maybe elements from the island of stability might help. Or something with superconductors. You never know.
Given that these things are neutral and effortlessly fly out of collapsing supernova cores, heavier elements and superconductors are not very likely to help.
By our current understanding, superconductors only exist under extreme cold, a condition never occurring naturally in stars and supernovas. So the fact that neutrinos fly out effortlessly does not preclude the possibility of a superconducting trap of neutrinos.
