The Beyonder

Species: Cosmic Entity
Enemies: The Avengers, Fantastic Four, The Defenders, X-Men, Doctor Doom
The Beyonder is a really compelling character new Marvel fans likely do not know about yet. He is the main big bad in Marvel’s “Secret Wars” storylines. Due to how massive those stories are, we’re sure to see films or television shows surrounding them sooner rather than later. The Beyonder is a cosmic entity that is the sum total of an entire multiverse. Referred to as the “Beyond-Realm,” the universe was accessed accidentally by Owen Reece. Part of its energy got out and hit Reece.
This gave him numerous powers, making him into the Molecule Man. The remainder of that pocket dimension manages to become sentient and curiosity. It decides to become a humanoid called The Beyonder. He creates a planet called Battleworld, which is made from different pieces of multiple planets. Those who were in sections of planets he took were teleported to Battleworld. This includes both heroes and villains from all over. Beyonder then forces them to fight for his amusement. Yet that is just a small bit of his history. Most feel Beyonder is one of the biggest galactic threats Marvel has ever had.