Is there anywhere besides Mississippi where this might be a possibility? Louisiana maybe? California someday?
Trying to think of the present and not the future, some candidates may include
New Mexico: 56% Hispanic (white and non white), 28% Non Hispanic white. Interestingly all 3 congressional seats are reported as at least plurality white, so I imagine they are also counting hispanic whites? Would those count towards VRA purposes?
Hawaii: It's 39% asian, 24% mixed, 25% white apparently as of now. Could you draw a majority, or even plurality white seat in Hawaii?
California: In theory it should have them already right? It's 39% Hispanic and 38% non Hispanic white. Or would Hispanics need to be a majority instead of a plurality for VRA districts to be required?
Looking at territories, there are some who might have to for their territorial/state legislatures (I imagine all would be at large seats except PR). Puerto Rico is what, 90% hispanic? So it certainly isn't getting a VRA seat (and even if it were, it would probably be for black Puerto Ricans)
The US Virgin Islands are 76% black, 16% white, 18% hispanic. So depending on the size of the legislature, maybe 1 white and 1 hispanic seat might be necessary?
Guam is 7% white, American Samoa is 1% white and the Mariana islands are 2% white, so they certainly aren't getting any white VRA seats.
DC might need VRA seats for the city council (or if it becomes a state, the legislature)
So, TL;DR: New Mexico seems like the most promising candidate in the short run. In the long run, Mississippi and maybe California?