If any anime company is crazy enough to do what the Zeta Gundam movies did, and combine mid-1980s cel animation with mid-2000s digital animation, please take my advice when I say that it’ll be a hell of a lot less jarring if you transition when the image is fairly dark. In this case, when battles take place in space and everything is nice and black or dark shades of blue, it’s fine. When it’s not, well…
Without video I can’t show you exactly what I mean, but here are some screen shots.
KIND OF OK
So basically, Initial D might have an easier time pulling this off.