New dauntless mechanic in the next update?

Hi, I just wanted to ask what is going on in this picture (specifically the raptor-looking behemoth and the guy in the back with the strange weapon), are we getting a new weapon type, are we getting an animal companion, etc? I only ask because I can’t find anything on it (and know one is talking about it).

Also I know that we are getting more weapons with unique effects, if anyone has the time or knowledge to talk about them, what are each of the new weapons unique effects (that we know of)?