Ronan has his uses. It would really depend on who he fought, but I think if he went up against Uncle Sam (his best bet), that the fight would be interesting, as long as he leans heavily on his UW.
Uncle Sam at his height can grow much larger than someone like Atom Smasher. He has taken on the Freedom Fighters at once and threw a Superman level meta to the moon. Uncle Sam is bad ass.
Well Ronan is more of a land based character like Sam, although he can use his weapon to attain great flight speeds. Let's face it, he wouldn't do well against the other members of team 1. Fate is the real problem, and that exception will end up in giving the JSA a huge opening for a double team. BR Bill, could deflect maybe, but then Teth would not have a suitable partner to dance with. I don't see a complete domination, but the JSA is simply the more well rounded team.
Marvel should have introduced Dark Angel of Marvel UK to the Annihilator's instead of that Ikon chick.
That UW of Ronan's could turn Sam clothes into some pretty sturdy stuff as well, and hinder Sam from growing out of control. Just something to consider. Ronan can be pretty badass himself. JSA wins this any old ways though.
Ronan might have the UW, but Uncle Sam is backed by the SPIRIT of America. He basically has unlimited power or close to it when need be. Last volume of Freedom Fighters, he fought some demi gods.
If he manages to mess up his clothes before he goes all giant, sure. And even if Sam were to grow that large, Ronan could alter the very ground that he walks on, and stall him with a BFR that may have him fall a mile underground. In the long run I think Sam could win, but don't sleep on Ronan if he uses all of his resources. Keep in mind that Ronan can fly, and pick spots on Sam to use the UW on.
That's an OP JSA squad right there. Forget the "weak link" chatter, JSA rolls regardless. KC Supes, Alan, and Fate might be worth two each, and Adam holds his own against anyone on team 2.
Not saying the JSA doesn't destroy Team Two, cause they do. But don't sleep on Ronan. I think he'd wtfpwn Uncle Sam.
Just recently he beat a Skrull Surfer that was owning the REAL Surfer (supposedly that's what a forum member said, I never saw the fight). Also during Annihilation, Glorian wanted to use the discharge of power from the Universal Weapon to fuel him so he could reshape an entire planet using his reality manip.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.