Intergang is an interesting choice. The presence of the Newskids and now Intergang mean Kirby is a likely influence, along with All-Star Superman. Whisper being present is unusual, plus she's more of a Batman/Batwoman villain. That would irk me but she hasn't exactly been used very much, and I DO like her, so I will see where that goes.
I hope this cartoon goes for some deep cuts with old school Superman villains. It'd be neat if Terra-Man, Kryptonite Man and Amalak made their debuts in a Superman solo proper (Terra-Man at least appearing in the Legion cartoon), along with Bizarro, Brainiac, Mxy, Toyman, Metallo, Parasite and Prankster. Get the Silver Age gang of villains all here.
No Doomsday please, and I hope they hold off on Zod and the PF criminals until at least the second season. Some of Morrison's villains like Solaris, Vyndktvx, Krull and the Evolver wouldn't be unwelcome either.