Hound is a Autobot Commando and new second in command Optimus Prime's in Transformers: Age of Extinction, after Sideswipe's disappearance. In Transformers: The Last Knight he also became the new Medical Officer after Ratchet's death in Transformers: Age of Extinction.
What the title says, my friends! Go right ahead and make your own team, whether or not it's your own Avengers or your own Legion of Doom, go ahead and assemble your favorite characters in your own team or teams!