[Shrink]

I can only see two options:
We get a padded out movie-version of Abe's Oddysee, or we get the 'original' story, which is bound to include elements from both AO, AE, and some other stuff which we are not clued into.
We know it's Abe. We know it's the 3 act structure.
We know it's got to reintroduce Oddworld to the world, and we know it probably won't completely destroy all Oddworld canon thus far created. As they've said, they're in the business of creating IPs. They wouldn't want to undermine their IPs by changing the story of the games.

Well, really, I see it as being the Abe's Oddysee story. I'm struggling to see it being any different, as much as I try.
Of course, it'll have more characters - it's a film - but it's Abe's Oddysee.