I would love that outcome, but I wouldn't hold your breath. The first three iterations of the SE have been based on two of the most popular body designs ever in the iPhone line. The last two, particularly, have been based on the single design that Apple has sold the most of in history, I would think. The value proposal of the SE to Apple is just that: they probably have already a backlog of parts, or could produce them very cheaply at this point. Could the same be said of the mini? It's been on sale for only a couple of years (and the 13 mini chassis had to accommodate a differently-shaped camera bump than the 12 mini). And it evidently hasn't been a great seller, anyway.
I know the rumors are saying that the next SE is going to be based on the XR design, and I don't know how that goes. The same arguments against the mini might be made against the XR. But Apple did sell it for three years. I don't know how popular it was...perhaps it was significantly more popular than the mini? Plus with the less expensive LCD screen? Plus only one camera to produce? I'm surprised they don't just keep basing the SE in its current form, with chip updates every couple of years...EXCEPT if they want to get everyone off the home button.