This post has some theories of which I made from some hints, evidence, and underused content from the game, that I believe will be implemented as LVL 80 Update after Daneos and Crew have finished rounding out all the bugs and puts the game in Beta Phase. Discussion is encouraged. So lets get started
(WALL OF TEXT WARNING! NO TLDR; YOU HAVE BEEN WARNED)
LVL 71-75 Area:
So we all know that there is an island above Papaya that would've been a future area in the original DBO. From looking at the official Earth map of Dragon Ball, I suspect this island could be 3 things:
Training Island (The Island Kame House went to when Krillin and Goku were training as kids under Master Roshi in Dragon Ball) 
I believe it could be training island just due to the location of the island and the size of the mystery island on the map. It wouldnt be out of the question either because we saw Goku and Krillin deliver milk to other humans, and that the island had an array of animals.
Gengoro Island(Which Penguin Village is on) & General Blue's Camp
This one could work due to the fact that the Red Ribbon Army had a base here, and it can provide way for a new UD and mobs. It is the island where Tori Bot's house is on.
Machine Island (Source: http://www.dbocom.com/forum/showthread.php?t=35131)
I discovered these screenshots while looking for information about the engineer class on the old DBOCOM forums, someone had found a new area by teleporting to a friend that glitched out of the normal map boundaries. The thing that interested me the most was the submarine, take a look at this submarine from dragon ball:
I feel like there would've been some connection to the pirate cave, and since the Island name was "Machine Island" the location of a TMQ that would be based on the Android Saga. Maybe this was a part of Papaya that was cut but who knows what files Daneos and his team have.
There is also the possibility of that Island being a combination of all 3 places i suggested, because the one thing they have in common is that they are located near Papaya and Kame House. But this seems unlikely because the game would need a way so that players can traverse to all the island without flying, maybe Daneos would make it so that flying would be required to go to this place along with a flight combat update?
LVL 76-80 Area: Fran Fran Desert South
So this area was kinda already in the game and would be the piece of land next to South Porunga Rocks. The interesting things about this place is it would've had a night time area and it is the location of Fortune Teller Baba's Palace: 
I can't really tell what the mobs would be, although I think it would be a mix of pirates due to the ships in the north part below Porunga Rocks SouthFrieza Time Breaker goons, spirits, ghosts, zombies, and other undead mobs. And it could also have had another TMQ.
Engineer, Mech Maniac, and Gun Maniac Master Classes
This class would have been the third human class, and would be mechanics, inventors, and those use who technology like Bulma. They would be a Human support class if you will. It's two sub classes would've been the Gun Maniac and Mech Maniac.
The main reason I think this class was not put into the game, was because what type of damage, attack range, and weapons would they even have?
I Personally think they would be a physical ranged class with tons of State damage abilities.
For their weapons I believe they would use side arms and lasers like Freeza army henchmen, and Tuffles.
Their skills would be revolved around fixing, making, and enhancing armour and weapons, Barriers and Shields, maybe a paralyze, summoning a little robot to help you out in combat, increasing/decreasing maximum weight, increasing status effect resistance, a teleporter?, an aoe buff that decreases your allies cooldowns and increase you and your allies skill effect duration, and small restoration skills.
Mech Maniac
This Sub-Class would be revolved around summoning and making machines, robots, androids to help you and your team in combat. They can be related to people like Dr. Briefs, and Dr. Gero. They would be more PVE oreintated but could contribute to Party PVP.
Here are some of the types of robots I think they could summon and of-course there would be a limit to how many robots you can have summoned at a time:
Great Robos-These robots would be great tanks with high health and defense and a few aoe skills, but low damage. Kinda like your own mini dark warriors Kappa.
forum.dboglobal.to/wsc/index.php?attachment/7405/
Peace Keeper Bots-These robots would be decent at PVP, because their lasers would have a good burn damage ability, a solar flare blind ability, and maybe a stun.
forum.dboglobal.to/wsc/index.php?attachment/7406/
Sentry Utility & Recon Bot-This Robot would act as a sentry turret doing high energy damage, but is immobile, could be used to assist allies with buffs or regen, be used as a vehicle? and could be unique by being able to gather crafting items and would have a chance to get a mystery superior and up quality item.
forum.dboglobal.to/wsc/index.php?attachment/7407/
Android-I don't have a picture for this one but maybe it would be customizable. These robots would be the physical atk dealing robos that revolve around speed and would have a few energy attacks as well.
Gun Maniac
This sub class would be based on dealing high burst state/phy./eng. damage on single targets with side arms, rifles, sub machine guns, and a bit of huge aoe state damage with rocket launchers, grenades, and mines. Some of their skills could also apply DOTs like:[/color][/size]
- Bleed
- Abdominal
- Poison
They can be related to characters like Launch, Mai, Van Zant, and Smitty. Their downside would be either long cooldowns or cast animations and high EP cost, but they could have passives that help with this and a few disables like a head shot which would stun or confuse enemies. This class would be a great PVP class.
What do you guys think?
