I don't know why people are so certain that this is Elizabeth Prime and not the Elizabeth who was kidnapped by Burial at Sea's DeWItt/Comstock.
From what I could tell this COmstock failed in taking the girl through the portal and in his depression popped into Rapture to start a new life. So as far as this Comstock is concerned Beth is dead.
This Comstock already had an Elizabeth. She was there when he tried and failed to steal a second Annabelle. It would make sense that witnessing that moment is what gave this Elizabeth her inner darkness.
Contrast might be gone in a month or two but I'm willing to bet Resogun will be free for a good long time/forever. I believe all of the first-party games from when Sony introduced instant game collection to Vita a year ago are still available.