Chapter 1: Upgrades

Master Chief, The Rookie, Dutch, Buck, Romeo, Avery and Miranda Keyes arrive in the Marvel Universe in the recently upgraded Forward Unto Dawn. They discover superheroes, The Avengers, and S.H.I.E.L.D on this Earth. They do their best to adjust to the new time period and do the universe some good during their unplanned stay. If it means fighting along Earth's mightiest heroes...
[Originally posted on FF.net, attempting at expansion]