What I think many people don't understand nowadays is that the people involved with approving attractions and such could care less about theme or breaking it. They simply are looking at GSAT numbers and if they see that something is scoring extraordinarily low, it's put on the list to be possibly removed/updated.
They are thinking nothing about theme when approving these rides (Rat, GotG)... it's simply about synergy and what I like to call the "Iger-effect". The only thing they care about is getting these properties into the parks somehow... they could care less where or which park they end up in because they know people will show up and that they will be popular.