Wow, thank you for the warm welcome.
Reading through the past few pages, I agree that Rogue's secret is the bigger story and I can't help but feel this is an adaptation of Gambit's Trial storyline, just the roles as been switched. We got the dark secret and the possible love triangle going on now and I think Episodes 5 through 7 will touch on the remaining beats, ending with a much happier conclusion.
Right now I think Rogue/Magneto will be over in Episode 5. If Rogue is deciding which path to take, a conversation with Gambit and Nightcrawler will help her choose the right one. I think Nightcrawler is a great character to help Rogue sort some things out, considering their history in the show. I wouldn't be surprised if we get an "I love you" out of Rogue before her secret drops. I do think this part story will all be wrapped up before the secret reveal at the end of the episode, like it was in the comics.
As far as Antarctica is concern (wild speculation time), I'm looking at Episode 7 and reads like it will be the X-Men versus the Hellfire Club so I can see Emma forcing Gambit, and maybe the rest of the X-Men, to see everything Rogue has done and our boy proves how worthy he is. Mastermind could take it the extra mile and do a mock trial with an Antarctica setting but I don't think it's necessary. If you believe Rogue is working to get control of her powers (please be true) then this Trial of Rogue storyline still works. I think the only difference would be her conversation with Nightcrawler.
Now if they want to give us that other important beat from Antarctica, I wouldn't complain. lol