My predictions for this movie (with potential unintentional spoilers)
Having watched the trailers, I'm going to start making some guesses as to plot points.
Given that this means there is a small chance I might be right, I'm spoilering the rest of this post.
I'm guessing that our young Gorilla friend is going to be the winner of this competition, but one of two things will happen.
1) He realizes his father is a dick and deserves to be in jail, doesn't bail him out, and goes on to do his own thing with the money. I actually think this is the less likely scenario.
2) He realizes his father is a dick and deserves to be in jail, but discovers something about one of the other contestants, potentially the Elephant, like they have cancer or some difficult to treat disease and they need the money, and he either intentionally quits just before the winner is announced, or donates the winnings to the other competitor, instead being content with the fact that he just had the chance to sing and be himself.
I don't think we're going to see much of the sheep singing Kiss from a Rose, which is probably a good idea... I've got that stuck in my head already.
The saxaphone-playing Rat/Mouse is going to try and rig the voting of the competition somehow.