In order to save the universe we need the ultimate team that could turn the tides of this war with the snap of a finger. So I have chosen the warriors who have been idolized and immortalized throughout the long years in which they have existed. Now without further adieu let me introduce them to you.
Leader: He man (Masters of the universe)
He isn't called the most powerful man in the universe for nothing. He man obtains god-like strength which is then multiplied by ten because of his battle harness. He is a skilled tactician and an awarded fighter who has accomplished many feats that even the most powerful comic book characters couldn't even do. He has drilled to the center of the earth with a broken stalactite, pushed the moon twice. Lifted the castle of Greyskull and hurled it, and even went toe-to-toe with the Man of Steel. He is a worthy opponent and a worthy leader.
Spawn (Image comics)
A special forces agent turned hell spawn, Spawn is a near god who is tough as adimantium nails and happened to banish God and Satan and took their place. His suit has a mind of it's own and can create anything Spawn could need in any situation such as: chains, guns, capes, armor, etc. Plus the only way he could be harmed is by necromagic and holy weapons forged in heaven. He has a slew of powers such as Imortality, teleportation, invisibility, flight, matter manipulation, elemental control, and anything else God could do. He can even mold Heaven and Hell to his own image. He lives and thrives by feeding off the evil energies and sins his opponents carry. He is a master marksman who is proficient at whatever firearm he picks up. He is essentially 'Evil-be-gone'.
Tarrasque (Dungeons and Dragons)
The Tarrasque is one of the most powerful creatures in Dungeons and Dragons. He is so powerful that people think it comes from ancient stories placing them as god-like creatures. It has super resistant hide and specializes in destruction to buildings and structures. It is 50ft high and 70ft long and is extremely dangerous and beyond anything even a heroic adventurer can handle. It is also believed that once one is killed another one will be born instantly, as well as that it will only awake from it's slumber once it senses the universe is in danger. When that happens there is no stopping it.
Batman (DC comics)
This character needs no explanation, but I'll give one anyways. He is a crime-fighter and key member of the fabled Justice League. He is at peak physical and mental capacity, and has one of the highest amount of willpower in DC comics. A select few of his accomplishments include: Taking on the Justice League single handedly, defeating Superman on many occasions, knowing every martial art known to man, being a multi billionaire, having the sweetest gadgets and gear around, being in four different lantern corps., being a master strategist, being almost immune to fear, and generally kicking a lot of butt. This player represents the sneaking and technology advantage that every team needs.