What threat?
Like people cannot own and play two games???
I guess people can't watch more than one television show either, that's why when family guy came on the air, the Simpsons ratings went way down. Oh wait that's not reality.
Stop trying to make something out of nothing and go work on your town. Peter Griffin told me it was okay for a Springfield but was no Quahog.
I'm just kidding.
Seriously, most of these people need something to do instead of coming here to ask where is the next level? Another game that holds their interest will be welcome, and it's certainly not going to affect revenue because completionists must have everything and will still spend money. It's apples vs oranges and you're actually allowed to have both.
So relax and look forward to a new game.