[@Zeroth]
Oh ye gods, the power rangers! D:

to answer your quesiton though:

[b]Origins:[/b]
You cannot change your origin after character creation. Which, obviously, means taht if you're a "Natural" hero, who isn't superpowered, you won't likely be able to "develop" superpowers later on. Because, you know, that would just make the whole "Natural" origin completely pointless.

Superpowers aren't necessarily tied to your Origins though. Like, everyone could potentially be able to fly - they just use differnet means or differents ways of achieving it. Likewise, anyone could gain the ability to use fire. It's just that one of you shoots it outta their hand with a mere thought, while the other one unleashes it froma  back-mounted reverse-vaccum flamethrower machine.

[b]Archetypes:[/b]
You know, I actually have a whole hider explaining all of this in my as-of-not-yet-ready OOC. But basically, archetypes serve as a "guideline" for what your character is and is trying/aiming to be. Obviously, this isn't an MMO where game-mechanics are in place to "balance" things out, so you don't need to see them as solid stone, set and done hard-locked templates or classes. You can deviate from them and do things to customize and personalize your playstyle. But if you're trying to aim for a Jack-of-ALl-Trades, I wouldn't recommend that. Certain Archetypes are just [i]better[/i] at certain things when compared to the others.

As for how much "grinding" you'll need to do to get a finished build. That depends on what you consider a "finished build". But, since I know a bit of how you think, let me put it this way:

You start the RP at level 1, with two abilities. Which can either both be actives, passives or one of each. On every EVEN level, you gain a new skill. On every ODD level, you get to upgrade one of your existing skills.

How fast you gain XP and levels I hear your next question is. Well. That depends on your own level and what you're doing. Early on, you'll probably gain levels rather quickly from doing evne the most basic stuff. Later on, trying to grind on stopping purse-snatchers and graffitti-artists probably won't see you ding anytime soon.

Did I miss anything? If so, bonk me head and I'll address it.