I think it would go like this:
Martian Manhunter and Vision are pretty tied, especially since they both have intangibility. But, Vision has an energy beam, which can get as hot as 30,000 degrees Fahrenheit, which, if you consider a solar energy beam a form of fire, would be enough to knock out Manhunter's powers. So Vision wins by a little bit.
Cage could beat Hawkman, but he'd need to get close to him. Since Hawkman's powers require close combat, it'd pretty much be a stalemate. Hawkman has the added power of flying, but it doesn't really help too much since he'd be too far away from Cage to hit him.
Machine Man might be stretchy, but he still has limits, whereas Plastic Man doesn't really have any as to what he could do with his powers. So it goes to Plastic Man.
Basically, it's a draw.