To me it feels like they kind of want to back up and punt for a sequel. They've set up things quite a bit story wise, but I don't know how far they want to get into it with the presentation the way it is.
I mean the no lip synching characters, the same guy cleaning the powerloader for the whole campaign (and other animations), the inability to fully explore the home base spacecraft for weapon/skill updates like you can in most other style of modern 3rd person shooters. It feels incredibly outdated and limited in scope.
I don't think it is a bad game.........but even with the DLC it feels very incomplete. It will continue to feel very incomplete even if they throw more campaigns in. I personally thought pathogen LOOKED cool........but felt pretty empty. My favorite part of the campaign are the last three levels of the OG campaign just because there is other stuff happening outside of your squad. It feels more lived in and less empty, it was slightly more immersive.
I guess sequel talk depends on how much money they are making. They COULD continue to update like they did Destiny.........it was very incomplete feeling as well but they worked on it for years afterwards to where it hardly felt like the same game toward the end.