The park have announced 2 new events: Mardi Gras and Carnival. Mardi Gras takes places in May/June, and Carnival in July/August. These accompany Oktoberfest (September) and Fright Nights (October):
The descriptions for the new events do sound reasonably similar. And with Oktoberfest too, it is 3 events which sound incredibly similar at heart, just dressed with different colours.
It's good to see the park diversify and include more events. But hopefully they are sufficiently different and worthwhile in their own right.