One of my favorite things in any Bethesda game is the followers you can get in their newer open world games to follow you on your adventure, they can be very useful from carrying all your junk to helping you in combat or just simply adding some dialogue while you spend hours walking around in circles. I'm sure many like playing solo but I am not one of those people. In Skyrim there were plenty of followers. It hasn't been said or hinted to how many people you can have as potential followers in Fallout 4 (Or maybe it has? If it has I have not seen anything for it) but I'm hoping it is a lot more than we got in Fallout 3 or NV, there was a very limited amount (compared to Skyrim anyways) which was kind of disappointing.
Obviously you'll get Dogmeat but I'm talking actual human followers. As you build a settlement you will attract people to live there, traders, etc. I'm wondering if you can attract people that could become followers or if everybody that comes to your settlement to live can become a potential follower (Sort of like the State of Decay System). It already has been shown you can assign guards, etc to protect your settlement. Just some more speculation until I can get my hands on it to find out for myself.