Constantine is, as far as I can tell from your image for ants, the only one with any hope of getting out. Maybe he can save the others, but his experience with the supernatural is key here. Its still going to be a rough night for him, but he is at least prepared for this.
Frank and Bruce are going to get absolutely DESTROYED. They both have way, way too much raw emotional trauma that they clearly are not dealing with for Silent Hill to not get its hooks in them and deep. Silent Hill isn't something you beat with skill or willpower, its about facing and accepting your shit until it no longer has power over you.
If Frank and Bruce could get over their traumas, neither of them would be who they are. Bruce would literally have to stop being Batman, and Frank would have to stop Franking, of their own free will and emotional growth. And I think we can all agree neither of those things is going to happen.
I have no idea who the third guy is. Someone in a suit. His life probably isnt that bad, he might be fine.