The dog is a little unfair.
Showing the dog scene alone probably puts more butts in seats than not including it (which would have made a great surprise for people that did go!).
DC was too dark before (comically so) and unfunny. They've gone in the opposite direction here and it's hard to gauge but it looks to be on a similar level as GOTG for lightness.
I'm not sure what Superman fans are looking for tonally. I'm not one of them.
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