Fridge Horror: It took several hundred years for the Bottled City of Kandor to be released back into the universe as its own planet. Along with Superman's memory being wiped about him finally saving them, this means that Superman probably died thinking he was unable to keep his promise in the present time.
Timber Wolf was living in the forests in the form of a beast, Saturn Girl mentions that there were "hundreds of voices calling out for help." Given the fact that Timber Wolf had little semblance of humanity at the time, who's to say that he hasn't been eating his father's experiments in order to survive?
Connecting to the "hundreds of voices" thing on Rawl, chances are these were innocent people who were most likely shipwrecked on the planet, wandered around for a bit and found a lone scientist in the forest who was willing to give them shelter and protection from the predators that dwell there, once their guard was down Londo experimented on them and turned them into animals. The worst part? From what we've seen they weren't returned to normal and are stuck living in the wild as animals.
In "Fear Factory," Lightning Lad is confronted by his childhood fear of a clown doll called Captain Howdy, which his brother told him would only come out during thunder storms. Seems silly at first (until you realize its name is a reference to The Exorcist), but then a gigantic, electricity spewing beast bursts out of the doll's mouth and as the second season would reveal, this was one of the lightning beasts that gave Garth and his brother their powers... and also seemingly killed their sister Ayla. So yeah, Garth had very good reason to be scared shitless.