I disagree that the jacket is out of style. Yes there's a connotation between the 90s and Matrix-y black trench coats and all black attire otherwise, but this isn't that. Its just a leather jacket. Those don't go out of style.
Not counting the shoulder spikes of this current iteration, of course.
"They can be a great people Kal-El, they wish to be. They only lack the light to show the way. For this reason above all, their capacity for good, I have sent them you. My only son." - Jor-El
You think of kon you think of leather jacket, fingerless gloves, and a black and red S on his black tshirt, if it's out of style then I'm fine with that, but I don't think it is Imo.
Reading List (Super behind but reading them nonetheless):
DC: Currently figuring that out
Marvel: Read above
Image: Killadelphia, Nightmare Blog
Other: The Antagonist, Something is Killing the Children, Avatar: TLAB
Manga: My Hero Academia, MHA: Vigilanties, Soul Eater: the Perfect Edition, Berserk, Hunter X Hunter, Witch Hat Atelier, Kaiju No. 8
Reading List (Super behind but reading them nonetheless):
DC: Currently figuring that out
Marvel: Read above
Image: Killadelphia, Nightmare Blog
Other: The Antagonist, Something is Killing the Children, Avatar: TLAB
Manga: My Hero Academia, MHA: Vigilanties, Soul Eater: the Perfect Edition, Berserk, Hunter X Hunter, Witch Hat Atelier, Kaiju No. 8
I'm pretty sure that's where they got the idea for that look from.
I would change the boots, S shield, and gloves
Add either tron or 90s original colors to the shirt
I don't really want kon to look like a generic superman type, he has been set up as the SUPER that has to watch out for his "dark side", and he has always been more casual (90s suit and geoffs TT clothes), so he shouldn't look the part... Atleast completely