Well, I believe it's time for this thread to be moved to roller coaster construction. Today is the 20th anniversary of the park and they have officially made their plans public. The coaster is indeed opening in 2023! At least the park made the obvious public. Here is the text in Spanish from a recognized radio and news station even though you might not understand it.
Los nuevos y exclusivos personajes de Guizmo (The Gremlins), Neo y Trinity (The Matrix) y de la película Mago de Oz serán algunas de las novedades. ¿Te apetece? Muy atento a @carrusel porque solo tendrás que acertar el resultado del Real Madrid - Getafe de este sábado y su último goleador |...
cadenaser.com
You can translate the last paragraph:
¨All these attractions will share the spotlight with a new roller coaster that will be released in 2023. Currently, the new and spectacular attraction is in the first phase of construction. It is expected to be next year when Parque Warner Madrid will have an innovative and surprising experience for all visitors.¨
The official statement by the park was sent to news stations and YouTubers so I don't believe I have a copy of it even though various YouTubers posted it on Instagram etc. This is an example and the coaster part is underlined in red:
Full copy of the press release (spanish):
https://lamardeparques.es/foro/viewtopic.php?f=30387&t=67674&start=195#p94102