High amplitude El Niños are actually remarkably predictable from a seasonal/subseasonal weather/climo standpoint.
The mechanisms/teleconnective bridges are straightforward, there is not some threshold crossing that would suddenly make a super El Niño winter behave like a super La Niña winter in terms of the middle latitude wave form response. The STJ will be continuously forced to be dominant over the northern jet, so that NW flow/NPAC high pattern you’re envisioning isn’t something that will come to fruition. Much more of the Pineapple Express variety stuff, with more tendency for canonical +PNA/Aleutian Low later in the winter.
The only theoretical possibility for a perturbation of that seasonal progression would be a full column SPV split/SSWE early on (late Nov or Dec), but that is very difficult to do in a super Niño/+QBO base state w/ easterly shear in its embryonic stages, especially w/ the SPV still in a developing state.