Has anybody seen the Lego Batman: The Movie? It's based on the Lego Batman games, but it's truly inspired from all lore. They do a good job with script and the light-hearted jokes are great. There will be confusion when the bigger budgeted The Lego Movie: Batman film comes out, lol. I absolutely love how Robin is portrayed as this bumbling sidekick, like how Batman will zip off in a motorcycle, and a crestfallen Robin will pout, "can't we ever just leave together?" It's cute.
Seriously, if you want to introduce Batman to younglings, the lego movie is great. Batman is a sarcastic hero, and he's as human as his Brave and the Bold counterpart (who for me, is just as great of an adaptation; I love his straight-faced inner dialogue like, "that's just gross" when facing gruesome creatures).
The big problem with that to me... is its literally LEGO Batman 2's cutscenes spliced together with some added scenes to replicate the gameplay segments.
I do like the other LEGO Batman as well. The one in LEGO Justice League is fun.