It really depends on how he words it and what they decide. I still believe that this is a ploy to get a ruling on the Amendment itself. You'll notice that this did not grant citizenship to the Native Americans... Which, again, were granted citizenship by act of Congress in 1924... The ruling on jurisdiction is necessary. Personally I think it would go against Trump.
I think a lower court would throw it out and the SC would not vote to hear it on appeal.