First, if anyone has any ideas for DBZ based RPs, I'd love to hear them. I just want to play a DBZ based RP, so let's brainstorm.

Here's the idea. Future Trunk's world, but we are clones of the dead fighters, raised in an artificial environment with time acceleration and enhanced gravity. Think of it as a technological mix of the "room of spirit and time" and the artificial gravity rooms. Basically, this is the only way the Dr. Briefs of this world could think of to fight them. Maybe a bit of the Android tech too.

edit: Well, I was going to say he had Gero's data, and we were using it to learn techniques, but if I'm going to do that, I might as well say he gave us all enough Saiyan DNA to survive in this high gravity environment, get zenkai boosts and go SSJ. So yeah, we could just be human-saiyan hybrid clones that farm Senzu. The fusion generator he set up to power the underground area we live in breaks down and he's dead, so we set out to find Bulma to fix it.

We'd start at a low SSJ level (or not have SSJ yet, since we wouldn't have a traumatic event to trigger the transformation), comparable to Goku after killing Frieza, and have to face them at that level the first time.

Test OP:

One Year Ago:
Dr. Briefs stepped out of the elevator, only to be greeted by his daughter. "Anything else I need to get?" asked Bulma. "Assuming we can find it in this nightmare world the Cyborgs left us."

"No, that's it." He replied. "I finished engineering the clones and they are growing in their pods, I even left them nanny androids, and reprogrammed that "android 16" to train them, thanks to Gohan bringing us the harddrives from Dr. Gero's computer after he killed that genetic abomination Gero made."

"And all of the Senzu, despite the fact that you're sick."

"They'll be the main food source for the kids, once they start farming them. Besides, I've got lung cancer, not pneumonia. If they work the way I think they do, I'd die seconds after eating one. I'd rather spend the next month or two with my family instead of instantly dying."

With that they walked off to find Trunks. His 16th birthday was coming up and they'd have to think of something special for the last birthday he'd have with his grandpa.

A year later the clones were sitting around a table with a cake, celebrating their eighteenth birthday when the lights began to flicker and the artificial gravity and time dilation device shut down, ending their sheltered life.

---

We are humans engineered with a bit of Saiyan DNA or Saiyan clones, which were grown in a tank and grew up in an underground base built by Dr. Briefs. The facility has a fusion reactor which powers a 100x gravity generator (it started at 10x and increased every few months while they were kids) and a time dilation device which makes time flow approximately 20x faster than the outside world. There we have been farming fruit, vegetables, grain, and senzu, though not meat, as no animal could survive this level of gravity. They have also been training, using the records of Dr. Gero and the "Z fighters" to prepare themselves to fight the Androids and save the world.
Unfortunately, we haven't really needed to push ourselves, and have never faced tragedy, so we are unable to go SSJ and don't really know our full power. We do, however, know any techniques we want from Dr. Gero's records.

Powers:
Everyone will know all of them, but will have favorites.

Kamahameha
Makenkosappo (Special beam cannon)
Bukujutsu (flight)
Telekinesis
Telepathy
Self destruct (sure, you can't practice, but...)
Multiform
Destructo-disk
Kaio-ken
Solar Flare
Dodon Ray
Four arms technique
Tri-beam
Gallic Gun
Super Saiyan*
Mafuba?
Spirit bomb
(tell me if I missed any)

*We don't have Super Saiyan yet, as we haven't been through something traumatic enough to trigger it.