Thoughts on zero dialogue films?

[StopMotionFilmmaker25]

Working on a stop motion animated feature that is *near* zero dialogue (some minor very obscure ancient dialect/made up gibberish with zero subtitles, and one english word spoken a time or two near the very end). I think the first half-hour of Wall-E proved it can be done well, but I'd like to hear if anyone has tips on making an engaging film with zero dialogue. I am planning on putting a lot of work into my sound design/foley as well as the musical score.
Any thoughts?