If Uni sticks to their 'nearly every other year' schedule for a new attraction in each individual park, and that's historically a pretty aggressive schedule., it'll take ten years (to 2032) to just get 5 replacement attractions. So, I would
doubt all of these wants will happen soon. Probably just a slow gradual process. Shrek and Fear Factor, according to Alicia's rumor info, appear to be the only imminent changes.....These wants are probably way more 'wishes' than reality.