Scooby-Doo is a strange case. The series has changed formats multiple times, sometimes completely, sometimes keeping the original formula but changing up how it's presented. By all means it either works or doesn't, and when it doesn't another one comes along soon enough. Meanwhile, they still make like 2 or 3 DTV's a year...plus there's a bevy of new Lego Scooby-Doo projects upcoming. Strange that this is the first new SD show that won't get the big network treatment with CN, but given how they basically just burned off The Tom and Jerry Show over last summer, but rerun it furiously on Boomerang, I get what they're doing with it.
Looney Tunes is by all means much more fragile, at least since Back in Action didn't capture the same imagination as the abominable movie that dares call itself Cat in the Hat. By all means, I think Loonatics was the worst concept for the Looney Tunes characters, but in reality Looney Tunes Babies was the worst actual show. Whatever can be said about Loonatics can be said about it, but my problem with it is that it was so incredibly, painfully generic. Especially since Duck Dodgers was all the edginess Looney Tunes needed and it worked. Family Guy/Simpsons style humor, great nods to sci-fi, even some surprisingly serious action and drama moments. All while being Looney and Toony. Loonatics was generic action heroes fighting generic villains with vaugley Looney Tunes inspired heroes. Though, to its credit, they actually tried in season two by replacing the generic super villains with ones based on their actual Looney Tunes antagonists. And, if you have that much faith in me, there were some shockingly decent episodes with Porky Pig and Sylvester and Tweety that were actually Looney Tunes like!
I felt Looney Tunes Show was a decent series, definitely not deserving of the hate it gets, but not quite what made the 90's shows and Duck Dodgers great. And I'm still baffled by the hate that version of Lola gets, but it's mostly from 90's kids who grew up with Space Jam and didn't realize how cynical and generic her character was. Plus, the show also made Speedy a main character again, something the overly PC white executives were too cowardly to do before. And it also got CN to rerun Looney Tunes shorts for a while, and that brought some interest back into the characters.
Though I still question why they bothered with a movie that was released a good 2 years after the show ended (not counting the Superman episode being held back a year for no reason). Tom and Jerry, Scooby-Doo, and various versions on DC characters get DTV movies on the regular. That's kinda why Johnny Quest was tossed into a T&J movie, to introduce the character because they're actually going through with the movie this time.