Listen, I'd love a Cartoon Network land on the scale of Toon Lagoon more than a solid chunk of people here; Powerpuff, Dexter, Eds, Johnny Bravo, Ben 10, Steven Universe, Adventure Time, Regular Show, Looney Tunes, all included in a massive detail-rich theme park land? It'd be a dream.
But you make "buying the Looney Tunes" or CN/Adult Swim sound like going out to nab groceries haha. Even with the current anti-animation executives over there, I think it'd be pretty difficult for Comcast to pull off a purchase of properties so thoroughly entwined with the Warner Bros brand. Plus with Universal's continued relationship with rival Nickelodeon/Viacom, I just don't see it happening.
I kinda see any talk on Toon Lagoon replacements, especially Dreamworks in TL, to be almost purely Blue Sky armchairing for the time being. Toon Lagoon as it exists is honestly really great and doesn't need a retheme. The greater park it resides in also doesn't need too much expansion or improvement for awhile, and the places where it does are not related to the bulk of Toon Lagoon. Zelda in LC, Grinch mini-land/Mt. Krumpit, River Adventure -> Jurassic World will all happen years before they lift a finger on retheming Dudley imo.