There's no way Collins could be the Dark One. He may seems scary, but he's definitely a friendly. He kept Miranda's and all the kids' hair to keep them locked in - it may seem outrageous, but he was definitely protecting them, after what we saw when Miranda first broke her jar and Max took her on a scare trip. He's a friendly with a scary appearance, don't worry.
Oh great! Springer finally spoken Dillon is the bad guy! Any Command & Conquer 3 fans would like to quote from that game, huh? "He's spoken! Dillon is now confirmed as a threat! Light him up! (crash! boom!)" Think they will purge that D-esease any time soon?