In a perfect world, we get a madcap trackless dark ride through the Warner Bros Toon Studios hosted by Bugs Bunny and featuring Yakko, Wakko, and Dot. Where ET now stands, we get a Duck Dodgers in the 24 and 1/2 Century ride using the same track but different theming (obviously). Yes, we lose a classic, but it's for the greater good (yet again). Add in a medium sized boat ride through the musical Looney Tunes (What's Opera, Doc?, Rabbit of Seville, etc), retheme the Nuthouse coaster to Wile E. Coyote and Road Runner, and rip out Fievel.
Theme the entire thing to a cross between DL's Toontown and a studio backlot, and you've got a land that can stand for the ages.