^Don't worry, they already said in previous interviews they have a lot in store for scenery. That is probably the reason why they finished the coaster so early.
Finally, I am very much looking forward to this new coaster although the only thing that I don't like is that extended mcbr.
It took nearly 16 years for b&m to take a hint from rct for the vertical loop.
Winterfest also looks really cool, I hope they redesign the Wonder Mountain's Guardian game for a Christmas based theme like they do with it for Halloween Haunt.
^With the other teasing that they did, and with all the new scenery. It is almost certain this will be themed to something related to Canadian history. The park already starting to theme other rides to this area such as vortex with the new wooden style trains. CW is starting to focus more and more on theming so it would be a shock if this new ride was unrelated.
Ontop of that, there has already been a coaster called Ziz https://www.coneyislandhistory.org/collection/page-35-feltmans-ziz.
Honestly, the bird is probably just for the teaser. It makes no sense why there would be a mythological bird as the theme of the ride. If you think of the rides and the area around it as a whole, it just doesn't make any sense at all to call it Ziz.
^There seems to be no point in keeping valvrayn's record since we all know it's not as good as expected. If you predict that it will have the same drop but be shorter that would mean one hell of an abrupt brake run to slow it down. Based off the information we know about where the brake run is, it is almost certain it will be longer than valvrayn.
When it comes to the name Ziz, the teaser shows a picture of an eagle not of a mythical creature.
There is a lot of theiming for this ride which fits the best as a gold mine theme. This area of the park is dedicated to Canadian history so it would make no sense to use ziz as a name.