I would say the Legoland Malaysia will look something similar to Legoland Florida. Since both consist of six same attractions, namely kingdom, city, mini land, technic, imagination and land of adventure. Thus you may take the reference of the Legoland Florida as a guide and imagine how the Legoland Malaysia will eventually look like. You can view the below video taken by PopSong1.
There are plenty of rides which I think the children will love them.