On earth the Avengers were forming well the Transformers were still on earth and were not discovered by man kind yet.

One day the Avengers had just finished a fight in the middle of nowhere when Spider-man saw blasting coming from a hill not to far away.

The Avengers went to investigate and Spider-man was the first to get to the top of the hill.

Spider-man: ”whoa”

The rest of the Avengers got to the top and saw Autobots and Decepticons fighting in the field.