All the Next Gen Nintendo SoC likely possibilities published by NVidia

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Conina said:

I'm hoping for Orin NX 16 GB, but probably we'll have to settle for Orin NX 8GB.
NX also was the Switch codename, that would be a nice coincidence.

Orin Nano would be disappointing. No DL-Accelerator would probably mean also no DLSS.

TDP is probably too high in the NX models. Nintendo would need to severely undervolt and underclock them to make them usable in handheld mode, creating too much of a gap between handheld and desktop mode.

As a result, I expect the Nano 8 as the most probable choice.