Okay, as far as combat goes, I'll assume that Melkor takes the same approach as last time.
train whips out his pistol and fires at the hexa-lion, hitting it squarely on the back. It seems generally unphased by the injury. Melkor fires and misses. Spiderman swings and misses.
The hexa-lion turns toward Melkor and attempts to bite him, but Melkor easily evades the attack.
train fires again and hits again, hitting one of the cat's legs. Again, the injury from the laser pistol is minor. Melkor attempts to fire again, but his pistol overheats*, slightly burning his hand and causing him to drop his weapon. Spidey swings again, missing.
The lion, perhaps realizing that train is the only one hurting him, turns toward him, attempting to claw him, but train is so agile that he never really has a chance.
train attempts to fire back, but his pistol overheats as well. Melkor, having a second weapon in his portable laser cannon, pulls it out with his other hand and fires, just missing the large cat. Spiderman takes another unsuccessful swing.
The lion again targets train and pounces on him, knocking him down on his back, causing some minor bruises.
*Overheated weapons are a result of rolling a 1 on a combat roll while using an energy weapon, so don't think it's because you did anything wrong. They'll require a minute to cool off and are then good as new.
Speaking of rolls, your team, unfortunately, is getting some really bad ones this session. Seeing as train is dinged up and without his pistol for a minute (1min = 5 combat turns), I thought I'd give you the opportunity to regroup if you so desire or change your attack strategy.
Also, to answer Spidey's question, right now I'm determining who gets attacked randomly. As you can see, you just got unlucky at first.