So my tournament is 400 point marvel i decided to try out some new avengers movie set and play this
Avm 202 hulk 255
Avm 208 hawkeye 65
Avm 203 nick fury 70
Total 390

I was wondering what object someone would recommend or any other input

I would recommend a relic/object that can be picked up on a 5 or 6, as opposed one that can only be picked up on a 6.

Obviously, the Hulk with the Power Gem would be a wrecking machine. The Soul Gem is a good fit for him as well, granting him Steal Energy, as he'll be in the thickest of the fighting for most of your battles.

Having the Red Lantern near the Hulk would give him a nice damage boost, but don't have him carry it, because he will use it as a light object in his first attack.

The Scorpio Key is a good fit for either Samuel L. Fury or Hawkeye, and you've got two different chances at picking it up. They would both benefit from the Crimson Gem as well.

My suggestion would be the Soul Gem to try and keep Hulk near the top of his dial.