I don't think there had been anything said anywhere that there are no other super heroes other then the main stars of each of these shows on their planets.
I just take it that it's early in the creation of them and the others just haven't appeared or manifested yet.
Oh didn't like James Olson. Bad casting.
There is a traditional style Jimmy Olson character but his name is something else, didn't catch it. He should actually have been Jimmy.
I watched. Liked it. Had a little bit at the end that I wasn't expecting.
Liked the nod to Reeves Movies with the if you can hear this, meet me...
The mention that the other guy also did something similar his first time out.
A superfriends mention.
Kara earth parents was a good touch...