honestly i think it would be more fun if they really never did show any more meeches. i know everyone loves the idea of seeing more of an endangerd species remerge but i think it will not aid in the believability (no matter how "big" oddworld is). its almost like what they are trying to do with munch and the last 150 gabbits. so what if we dont see one more one legged species, we really already knew that this one was gone. it should stay that way. meech munchies were so good that they killed off a species, the end. i dont think cloning them is a good "excuse" to bring them back either. just let them be dead. (and if you really really STILL want to see one maybe they could program in a stuffed one in an exhibit or something at an interior museium looking level.) i really dont think they should bring them back even for a game. its so much better if they just kept making references to something we never ever get to see. (though flashbacks could be ok MAYBE)
for the sake of not repeating too many ideas and keeping the story kinda sad they should leave them as lost to the ages. its more epic that in the long run there will be imeasurable losses toward acheiveing their destinies.
just my preference leave em dead!

(sorry meeches)