In this Wizard Universe interview, Geoff Johns says:
WIZARD: You’ve said that Starman’s lines, though they seem random, will all make sense in the end. Any lines in particular from this issue to pay attention to?
JOHNS: He mentioned the name “Kenz Nuhor,” and if anybody does a quick search on the Web, they can find out a lot more about who that is. Starman’s entire history can be figured out in this issue. Every single line he says to Power Girl means something. Eventually we’ll lay it all out for you, but if you work a bit you can figure it all out. If you’re a DCU geek you’ll get it, and if not, he’s just a cool, crazy character who got lost somewhere.
OK, let's see what Starman says in
JSA #2....
1.
"Thou shalt not kill! It's part of the code!"2.
"I don't like murder. This whole horrible thing has gotten me uncomfortable. My powers aren't supposed to work this way. I make things heavy, you see? But this... Murder is... Kenz Nuhor, does that name mean anything to you? Is that the name of murder? 10 votes to 9!"Briefly: Kenz Nuhor was a guy who was in love with Nura "Dream Girl" Nal, who was in love with Thom "Star Boy" Kallor. The jealous type, he tried to kill Star Boy, but Star Boy killed him in self defense. The Legion, which at the time had a "no killing" clause in its Constitution, held a vote to see if he should be allowed to stay, but in a 10-9 vote, kicked him out. You can read the whole story from
Adventure Comics 342 (March 1966) here at
Scans Daily. Obviously, this is pre-Zero Hour.
However, I don't recall a time when any Star Boy had the ability to make things super-lightweight as well as super-heavy.
3.
"You're going on a journey, Power Girl, bouncing around like I did, like a beach ball."4.
"Do you hear her? She's crying. I wish she would stop crying. She said it's a doctor... a bad one, too. Not like my friends at Sunshine Sanitarium... But... Oh, no... there's a storm coming. A Lightning Storm.""Lightning Storm" is a reference to the upcoming JLA/JSA teamup called "Lightning Saga", which
starts in April. The 5-part saga will be in
JLA 8-10 and
JSA 5-6. (Alternately, it could be a reference to the upcoming Legion of Super-Villains episode of the same name of the animated Legion series, but probably not.)
Supposedly Dawnstar (who we saw previewed in issue 1) will appear right after the JLA/JSA crossover, in issue 7.
Don't yet know who "her/she" is - Dawnstar?
As for bad doctors, here's a list of DC super-villain doctors from the
Unofficial Who's Who: Alchemy, Bedlam, Cyber, Daark, Death, Destiny, Double X, Excess, Fang, Light, Moon, Phosphorus, Poison, Polaris, Psycho, Regulus, Spectro, Seven, Trapps, Tyme, Tzin-Tzin, Vortex, and Zodiac. None of them sound like they're good candidates.
5.
"It's coming, isn't it? The Great Disaster. I have to find her and him and her. She's talking to me and he doesn't know and I have to find them all before the storm."Don't yet know who "her" #1, "him", and "her" #2 are.
The Great Disaster which was started by the great nuclear war of 1986, brought about
Kamandi's timeline. Maybe coincidentally, the ending to the recent "The Battle for Bludhaven" showed a "Command D" bunker....
6.
Mr. Terrific: "I've been working on a theory involving superstring, dark matter, and hyperspace for the last year and a half. Some scientists believe gravity is a weak signal from a parallel universe. I think Starman just proved them right. How did you know how to do that?"
Starman: "Third grade science. I got a B+. And it helped me... I think I know... I was trying to come back here but I landed somewhere else first... and I was trapped! Trapped someplace that got blown to Kingdom Come."There's no such thing (in real world) as "Some scientists believe gravity is a weak signal from a parallel universe," that's
not just comic-book physics. (I corrected this - I thought it
was comic-book physics!) But I think it's important here - Thom controls gravity, so maybe they're setting him up to be from a formerly-unseen parallel universe (the new Earth-2 maybe?).
And his last statement, plus the page itself, strongly suggests that this Starman is not only the grown-up version of the pre-Crisis Star Boy (from his Kenz Nuhor comments), but also the same Starman that was seen in Kingdom Come.
(Oh, and the villain behind the scenes in JSA #2 is most likely Per Degaton, a time-travelling Nazi with whom the JSA has lots of experience. And I bet the new Steel is the guy who got turned to metal, not the guy with one leg. But enough off-topicness.)