Animated. Maybe could pull off rotoscoped cel-shaded 3d over 2d backgrounds (least thats what ive done...once. Timing keys are the hardest part, and lip-syncing to dialogue. Which ive never done.
Sorry. I realize im sounding like actually putting a potentisl project into plan, though im only thinkin hypothetically based on what very little ive tried.
Done some hybrid 3d anim, but it was my first real attempt and burned me out for several years. Guess i already have resources, just not money...
Getting voices to match the characters would be the biggest challenge-haven't looked up specific names, been a minute since i've kept up with entertainment biz. But then again, I'd feel anything works if you are familiar with disney and older style animation--as far as voicework goes.
So, uh. Definitely animated, hybrid, and maybe done my me? The cast director can handle the voicework...