It could certainly go down that way. However, I believe it will be a bit more organized than Zion showing up and the gang trailing behind her trying to keep her from getting hurt. Zion doesn’t really strike me as the subtitle type so I’m guessing sneaking in and attempting to take out the legion is not the way she would play it. Any lone direct assault would be a suicide mission so I don’t think she would go that route either.
The entire gang already has reason to be going after the legion anyway so I personally believe it would be a serious raid calculated and coordinated by Kyra. It could be that because of that whole situation on the bridge, Kyra has had someone scouting the legion and the scout reports that the legion has captured the MC. That would make for a good last minute rescue justification.
I just hope that the legion storyline is kept somewhat short. It would be really nice to see the bulk of the next update be about the dynamic and relationship between the queen, the raider sisters, and the MC.
A mod deleted my reply to you for odd reasons probably having to do more with how they veiwed it then how it actually was written. I will just repeat the parts that were completely unrelated to the topic that apparently triggered the deletion.
Zion is probably the LEAST subtle of the bunch by far, as even Kyra and Asha are considered reserved, by comparison.
Those two will almost certainly launch a rescue if they find out our boy has been captured, because they're clearly both hooked on him.
The dynamic between the 3 will be intetesting, but I strongly suspect, given the odds, that each will get their own lone trials, with the girls each possibly facing unwanted group affection.