I hadn’t heard of ER = EPR, but I like it.
Have you heard of the 4-geon model of elementary particles by Mark Hadley?
“It has been shown by Hadley that the logic of quantum mechanics is consistent with general relativity when closed time-like curves are permitted.”
Closed timelike curves in general relativity are pretty interesting. They give rise to the “grandfather paradox” which Kip Thorne explores in his 1994 book Black Holes and Time Warps.