[b]Message I will be posting whenever I will draw AB 2 art until I watch the movie after October the 16th : no I didn't see the movie so sorry if what I draw and describe contradicts canon but don't tell me if that's the case because I don't want to be spoiled thank you[/b ]
I think I finally found the right colors for Zeta and Mighty Eagle ! Even thought here it's not visible for the effect I added for dramatic purpose lol
The picture was supposed to be read only one way but now there are 2. Initial interpretation, they meet again in the sequel after years of being apart, breaking their hearts ; like many fans I like to see it's because of Mighty and he feels very guilty to have let her done that way to the point she's now a villain hence his sad worried face, and Zeta has a huge grudge on him while also feeling deep regret, hence her angry suspicious glare that has a touch of sadness too. Second interpretation, since I made her look more grumpy-sleepy than resentful, she just woke up and doesn't have her coffee yet and Mighty Eagle, who stopped to be used to see her morning face and behaviour after decades apart, is concerned. You choose

Angry Birds, Zeta and Mighty Eagle © Sony Pictures Animation and Rovio 
Drawing and idea © me