I think I'll give some more specific thoughts on the trailer.
Yes it's clear they're taking a lot of inspiration from the Lego Movie, especially with the premise of going to several thematic locations to reach their goal. Though its also clear that they're going out of their way to make it different.
The idea of real world people getting magically sucked into the toy/imagination world, while not exactly original, is interesting.
On top of that, I did find some of the jokes to be somewhat funny.
All things considered, I'm looking forward to this, just to see how it turns out. Am I going to see it in theaters? No. But I'm still eager to see the final product.