While the concept art looks good, I'm a bit tired of gaming companies like Gearbox playing with the Aliens formula that was already so well established in the films. The WY mercs from Alien3 are fine just as they are and I don't think anything ever needed to be changed about them.
Also, I don't think we need new xenomorph to make any new Aliens game more interesting/challenging. The xenos established in the films are good enough as they are. If a developer want to add more challenge, then they just need to raise the population of the hordes coming at you. That's it.