Considering as some seem to be insinuating, they do want to make this new park their "Magic Kingdom" and more family friendly, i'd only assume they'd want to avoid the types of coasters and coaster designs that could be a huge liability or make for bogged down queues. Especially with what they've learned in the years they've been operating and with a chance to build a whole new park from scratch.
In regards to immersion, i do think completely different considerations are in play when considering "immersion" across a whole park versus just one land in a park. There's definitely gonna have to be compromise,ips/lands they prioritize immersion for over other ones and other elements of theme park design to come in to play, like good flow and cohesion in how the lands are arranged. There's also something to be said to building anticipation, to seeing a notable landmark or ride from another land and wanting to ride that/go there and most don't actually want to have to look at a map/app to get an idea of where they want to go next.