A new RollerCoaster Tycoon has been announced only for mobile. No word yet on a release date although it is likely to be soon. You will apparently be able to build coasters, hype your park to the guests, even visit your other friends parks. However, it does not appear that you will be able to only build a roller coaster half way and then let the guests fly off of it and explode. Or let animals get lose and chase down some guests. Whether or not we will be able to lock people into the park is also unknown.
Some of the best experiences with the series were going against the rules and doing what you want even if it killed the guests or was outrageously overpriced. Whether or not these things will be possible in this new mobile version is unlikely since the controls will likely be less advanced due to the mobile setting. Either way, I look forward to building some coasters on my iPad.
Here is the trailer: