I presume others brought up this theory in other places as well, but I wondered if that blonde waitress seen at the end of season 3 might have been Supergirl. Honestly, I'd rather see her than the Legion.
I imagine if the Legion will appear, they will focus on the founding members like Cosmic Boy, Saturn Girl and Lightning Lad. But there are a few more I'd like to see, such as Timber Wolf or Karate Kid. They might also continue the Flash legacy theme, and bring in XS as it was speculated before. I don't expect them to use too many Legionnaires in the next season, though.
As for the Fatal Five, as I said in my retrospective a few months ago, I'm in no rush to see them again. (Granted, it will probably take another year or so until YJ returns, but I kind of doubt my opinion will change much. )
I imagine if the Legion will appear, they will focus on the founding members like Cosmic Boy, Saturn Girl and Lightning Lad. But there are a few more I'd like to see, such as Timber Wolf or Karate Kid. They might also continue the Flash legacy theme, and bring in XS as it was speculated before. I don't expect them to use too many Legionnaires in the next season, though.
As for the Fatal Five, as I said in my retrospective a few months ago, I'm in no rush to see them again. (Granted, it will probably take another year or so until YJ returns, but I kind of doubt my opinion will change much. )