Maybe they just had to repurpose the destination, from the Phantom Zone (with or without a Fort Rozz at the receiving end), to the Daxamite ship?
The Phantom Zone is traditionally another dimension where people remain ageless (and incorporeal, in the comics -- hence the name). Presumably the "area of space" near Krypton is a natural portal to the Zone, while the Projector is an artificial portal.
Again: When Henshaw was repurposing the Projector, there was a line saying that if his modification didn't work, they would be trapped in the Phantom Zone. So no, this is not "just a teleporter." It is exactly what the Phantom Zone Projector has always been in the comics and prior screen adaptations, a device that sends people into the Phantom Zone.
And it makes sense that it would be that, because it opens the door for introducing more Phantom Zone-based villains in the future. Heck, maybe that's where Zod came from. Maybe that's where Zod could come back from in some future story.
I'm not an aficionado of the Superman comics or previous Superman TV series, so I was unaware of silver kryptonite and its effect on our heroes.
Silver kryptonite is actually an invention of
Smallville, an artificial form created by Brainiac to give Clark hallucinations and paranoid delusions. It was introduced in the comics in 2008, where it basically got Superman high. The only silver K in the comics before then was a fake prop in a
Jimmy Olsen issue.
http://dc.wikia.com/wiki/Kryptonite
Did Alex have to bring them to the Fortress of Solitude to negate the effects on Kalel and supercharge Kara after the fight?
I think they said Supergirl woke up long enough to fly them both to the Fortress and then passed out again, but I'm not sure.
I have to admit... I cheered when Lena told her Mother that Supergirl had the remote to control the lead based device. "SEE! She IS a good guy!" I shouted when that happened.
It's weird to me how the expectation that she'll turn evil persists in fandom no matter how many times she's proven herself good. In the comics, Lena "Thorul" was always pure and good, and Lex's only good quality was his determination to protect her from coming to harm or learning that she was related to a villain like him. (Although there have been one or two more recent stories with a villainous Lena, but that's the exception rather than the rule.) And really, just in general, it makes no sense to assume that a criminal's family members will be equally criminal. I mean, Kara's aunt Astra was a villain, and nobody thinks that means Kara will turn out evil.
I don't see Kalel's honest reaction to what he would do if asked to choose between Lois and "the world" as a weakness.
Of course not. Superman's compassion is his greatest strength. And just because he doubted himself doesn't mean he really couldn't do it -- it just means he's naturally humble. I'm sure that if that situation actually happened, Lois would be the first to insist that he sacrifice her for the sake of the world -- heck, she'd do it herself and save him from having to make the choice.
As for Superman and Supergirl tag teaming Rhea... that wasn't how the challenge goes. Supposedly the Champion of Earth against the Champion aka the Queen of Daxam fights in the challenge. Of course, who among us thought Rhea was honorable enough to fight fair?
Yes, it was a given that Rhea would cheat. Also, there's no way Earth's governments would've just accepted the outcome if Supergirl lost. She really didn't have the authority to make that promise.
I do wonder why Kara and Kalel didn't weaken whenever they were around Rhea, given she was part green kryptonite.
Presumably her superstrong skin blocked the radiation.
I've been wondering where Max Lord was through all this. If not for the vagaries of actor ability, I'm sure he would've gotten involved somehow.