Basically I like everything I’ve seen of Newton’s other than his Batman. It reminded me too much of Ernie Chan’s version for some reason. Given how good he was on Shazam and New Gods (which was so different than the original I tend to think of it more as an earth two version than anything else) I think it’s a shame they didn’t give him some more Superman work
Maybe it's the frequent Alcala inks on Newton's BATMAN and DETECTIVE issues that reminds you of Chan, both having similar inking styles.
I never really thought of it before you said it, but the whimsical elements that made Newton so perfect on Shazam would make him a good choice to do a SUPERMAN run.
Newton did at least one issue of DC COMICS PRESENTS, so you can get a feel for what a Superman run by him would have been like.
https://readcomiconline.to/Comic/DC-Comics-Presents/Issue-54?id=55560#2
