Batman and the Outsiders #1: Pages 18-19

The sun sets. A bunker on hill...We're about to witness the creation of a hero. Not just any hero. A future Justice Leaguer...
Oh Dr. Jace... I love how you're sure Prince Brion will get powers, but you just can't tell what they'll be. That's just the kind of science Prince Gregor wanted to pull the plug of! If I was Brion, I think I'd be a little worried that she's standing wayyyyy over there while she pulls the switch.
And then she starts babbling about old superstitions, and that's when ol' Brion realizes maybe this wasn't such a good idea... Is that a ball of dirt in the glass beaker? That's it, right? He'll be getting the powers of dirt.
Meanwhile, the civil war keeps dividing a country so small, only three guys are required to attack a bunker.
And ZAP! Brion gets dirtified and becomes... GEO-FORCE!!! And there was much rejoicing. And maybe somebody called him a Messiah. In Markovia that means a recognized religion probably popped up overnight. You don't need a lot of signatures in a place like that.

Costuming question: It looks like the suit was part of the experiment, like those crosshairs on GF's belt were to know where to shoot him with the Dirtitizer, and maybe those big bracelets allowed dirt energy (Dust Particles) to pool near where the power needed to manifest. But if that's so... a mask? Well, I guess it was the same for Terra. Skip all origins, do not collect 200$, and go directly to Super Team.
We know how he got his powers. What we don't really need to know is a) his motivation for becoming a superhero (especially if he leaves Markovia), b) where he got the costume, and c) how he learned to use his powers. For (c), just look at this panel. It's that easy to figure out your unknown and extremely varied "geo-force" driven powers.
Just like he instinctively knew he had super-strength. Why KRASSH and not CRASSH? Geo-Force even hits with an accent.
Having been turned into an Atari 2600, Geo-Force then uses his Space Invaders powers to disarm the Baron's evil army (well, two guys at any rate).
Lava blasts? So is there actually molten rock coming out of his hands? Doesn't really look as impressive as it sounds, does it? I am, however, totally terrified by the way GF uses his crotch for crime fighting.

But wait... weren't there THREE guys?
OH NO! TOTALLY OUTFLANKED! Although, you know, it looks like the guy missed, so Geo-Force is probably fine. Put down confetti, he's not done for yet.
And since by now all our heroes but one are in costume, let's get Metamorpho out of those clothes and into his rubber bathing suit. What? We haven't seen him since he pulled an Oprah Winfrey on page 11? No matter, just make him be at the bunker already. Pull a Mission Impossible if you have to. There we go. Now he can break up the Baron's illicit dating agency.