That sounds a lot like speculation.
Because it is.
"The current Switch can't handle it," that means nothing more than the game in question won't be ported. What can be infered from such a quote is that a port would be up for consideration if a more powerful Switch existed, but at that point logic has to kick in. Third parties do not make games exclusively for a more powerful version of a console because the installed base isn't worth it. That's the thing that the people who fantasize about a more powerful Switch commonly forget; the very reason (AAA third party games) why a more powerful Switch seems to make sense is instantly contradicted by the historical way of how business is done.
I know you know it, but you didn't provide an explanation in your post.