Python’s core developers don’t even seem to care about other Python implementations (only about CPython).
There’s no way they would move to, say, PyPy as the official implementation - let alone to a VM designed for a completely different language.
Which is a pity, Python ends up being the only major dynamic language, where for all pratical purposes there is no JIT support, because while there are alternative implementations with great JIT achievements, the comunity behaves as if all that effort was for nothing other than helping PhD students doing their thesis.
At the time of the original Py3 release, PyPy was not ready for wide use. Otherwise maybe there could have been a chance of it replacing CPython. They were in too big a hurry to ship Py3 though. Tragedy.