I called it in the spoiler for this chapter that Marin would be the one to subdue Lucy and Erza, not the soldiers.
Personally, I don't think either Brandish or Natsu/Gray will win. I'm expecting more of a tie. However, if there is a victor, it will be Brandish because the next chapter sounds like it has something to do with her magic and it doesn't sound too hopeful... lol.
Also, Juvia thinks just about any person that's near Gray and not fighting him is a love rival, so... xD
For those of you saying that Natsu should be able to one shot anything because he needs to be able to beat Acnologia, you are being ignorant of the fact that we have no idea how far into the future that fight is, and Natsu has yet to showcase curses. Sure, he's stronger, but he still has room to grow.
For those of you saying that Natsu will always win because of "nakama bs", are you forgetting that Natsu's power grows with his emotions?
Now, where's Wendy? Oh, right. If I had to guess, if Natsu loses, she's gonna appear and save the day with the informant. :3 lol