So, just to keep up this tradition of trying to predict the banlist, here I go with my attempt:
Black Luster soldier envoy of the beginning
dragged down to the grave
Elemental hero bubbleman
deep sea diva
fire formation - Tenki
So, librarian uh? Yes. At first I though rekindling should be limited, but then I realized that konami is pushing many fire archetypes. However laval have been out for long time, and the only problem with them is that librarian is broken. When Laval find a way to resolve the first rekindling, they make Librarian and draw 4-5, probably getting another rekindling and ending with quasar on the field. So, if konami don't want to touch rekindling, he will ban librarian to stop the massive amount of player that will jump on laval when the next hidden arsenal will came out.
Everybody knows why black luster should be banned, I don't need to tell you how broken this card is. Also, there is no market for him anymore, so konami wins nothing with this card on the game.
I don't know if Heavy Storm should be banned this time. But I have to stick to my prediction because I have been telling this for a year now and I know someday it will happen.
Mermail have been a strong deck this format, however I agree with Simon He when he said: "After summon moulinglacia the deck does nothing". The decks real problem is how fast it is, It goes for megalo and then Moulinglacia in only 1-2 turns, probably sealing his wining in the process. Limiting atlantean dragoon should be enough to avoid the megalo-moulinglacia play and force them to not play recklessly.
Rescue rabbit to 1 need no explanation
Elemental Hero bubbleman shouldn't be limited. The real problem here is Heroic champion excalibur, which is actually a syncro monster if you realize that he lose both material after his effect goes on. With both monsters in the grave (alius/bubbleman), you can active miracle fusion in the same turn and bring good fusion monsters. So, to fix this HERO fever, bubbleman should go to one.
Many people think grapha is the main problem in Dark worlds. I think It is the only good think in the whole archetype. The rest is only to search and summon grapha. Dragged down to grave is way worse, it not only active a dark world monster and add a fiend to grave. It also let you check the opponent hand, a privilege that few cards have on this game. And most of them went finally limited or/and banned.
Wind-up is probably one of the most consistence decks in yugi-oh. Almost any two cards in the deck create a combo with each other, and probably the most annoying combo in the whole deck is magician-shark, which sometime ends in shock ruler. So, to avoid this combo I think we only need to semi-limited Shark and magician. The probability of this combo is reduced and limiting factory to 1 helps to assure it. The deck is still playable, which is good.
Fire formation tenki should go to 1, but putting at 2 will help to stop the sacred deck in the OCG and still let fire fist do some tricks.
The main problem with this prediction, is that banning heavy storm will push many old decks that used to work when Heavy storm wasn't on the game. Like Gravekeepers, Six Samurais, evols, geargia, among others. And I don't think konami want that, also I'm not sure if Fire king Garunix and Fire fist - Bear will be enough to stop people from shield themselves.
So, that's it. hope get some things right this time.