I went ahead and double checked what I said earlier, The LEGO Book does not call "Galaxy City" Futuron, though I have a nudge that it was called Futuron before, but until good evidence can be found, it's better to assume there is no such thing.
I don't think anyone caught "Planet Selva Galaxy" in January-February 2013 LEGO Club Magazine from Galaxy Squad. According to the Magazine a "Swarm of Strange Bugs" have been infiltrating this planet/galaxy. They have consumed several planets and are being held back by Galaxy SQuad Elite teams. I believe this is a galaxy according to the description and may be named after one giant planet but we can't know for sure.
CONFORMATION THAT INSECTS FROM GALAXY SQUAD ARE INTENTIONAL REBOOTS OF INSECTOIDS.
ALSO:
In the magazine there is a small box describing the bugs specialty that says: "With their insectoid space ships and massive numbers, they are a threat to galactic peace." This is supported by the fact LEGO nowadays would never introduce a theme all about villians/one faction. It's like having LEGO City being only made up of the robbers and no police.
I recently got myself my own copy of "The Unknown Galaxy" so I can answer any questions about the comic!
WARNING: THE FOLLOWING PARAGRAPHS CONTAIN LARGE SPOILERS OF THE COMIC BOOK "Jim Spaceborn: The Unknown Galaxy"!
Kazak is NOT a planet, though in the comic Keko says how the Spearhead has landed inside "Kazak's Galaxy". This does not mean that is the actual name of the galaxy though, it mostly refers to the fact that Kazak conquored most of the galaxy they are in and is in control of it all.
There is also no direct proof that Kazak's men/faction is called Kazak. At one point in the comic one of Kazak's goons yell, "That robot belongs to KAZAK!" which shows how they do not have a name for their faction but rather answer directly to Kazak. Some people think these men could be Blacktron/early version of Blacktron because of the black suits and the ships having the color scheme of Blacktron I (I like to think of it that way myself) but their uniforms sport a logo that looks more like a castle crest.
You should add more to the planet Commercia is on. "Everything seems to be for sale here!".This could be interpreted as sarcasm to show portray Commercia as a highly advanced place. Also, Commercia in general is not a planet (at least no serious proof is found to show this). Commercia is a city on some random planet Jim and Viva were sent to explore. Also this planet may have swamps becuase of how Jim and Viva crash into one when trying to land near Commercia.
I think Zonia could possiblybe classified as Earth. It's hard tying together everything properly with other information we already know but as the crew of Spearhead are human, Zonia may be another name for Earth or it's just that the main base of the Classic Space organization (better known as the Federation in the Neo Classic Space community).
For the planet Robus there should be more description. There is a native fruit there that is called Zeir Palms. They weigh tons and can crush a space ship. Possibly the same fruit as the one used to power the robots, only much bigger and heavier. Robus also has a Robot population led by L-Sie (also a robot). Many of these robots were taken as captives by Kazak and the rest grouped together as rebels/fugatives to fight against Kazak. Although this planet does have a population of robots, it still has organic life forms (Ex. in one pain a detailed bird is spotted in the backround). Kazak's fortress and army is/was located on the planet. though it is unknown if the fortress was destroyed or just left there. The robots also have a city on that planet but were driven out by Kazak.
I really hope all of this helps! Since I have "The Unknown Galaxy" sitting handy next to me, I can give out detailed information on things in it, though I still have no idea why I can't find a copy of "Invaders from the Swamp Planet"! I wonder what happened to it, I really need to get myself a copy... and I'd also like to know what issue the interview of Frank Madsen is in. I've had dreams of seeing that...
I saw that you wrote that Earth is also known as "Terra", do you have an idea of where that name came from? It's interesting to know.
There are quite a lot of Hero Factory Planets and I still think they should be grouped off. They take up a lot of space (no pun intended!).
I really love this list and it's exiting to see all the planets we got over the years! This is great!