Kitchen Kabaret. It's by far the show I miss the most.
Although Cranium Command comes pretty darn close.
I'd choose any and all animatronic shows to come back. Disney does animatronics shows like other parks don't, and that thing they do is make it actually GOOD.
My favorites in a list are
#1. Cranium Command
#2. The American Adventure
#3. Carousel of Progress
#4. The Country Bear Jamboree
#5. Mickey Mouse Revue
#6. The Enchanted Tiki Room
#7. Food Rocks
#8. Kitchen Kabaret
#9. The Enchanted Tiki Room Under New Management
Cranium Command, Original Tiki Room, and Mickey Mouse Review need to be brough back. The Tiki Room can replace the new piece of junk and Cranium Command could be brought back from the Wonders of Life pavilion just featuring the two attractions. You could have a main lobby inside with activities for kids. Then two new longer queue lines. Mickey Mouse Review can replace Sounds Dangerous (if it fits) or Playhouse Disney Live on Stage.
As far as Food Rocks and Kitchen Kabaret goes, KK could easily replace the Circle of Life after all it has a big stage for a movie...:lookaroun Food Rocks could be a very good show if they have better animatronics this time. It could be in the main eating area in The Land! The stage built up on the side of a wall and every 30 minutes it could play while people eat. Like Sonny Eclipse.
The Country Bear Jamboree needs a major refurbishment (again) as it is in the worst shape it has ever been in, as well as they could bring back the other two seasonal shows.
Carousel of progress just need updating in the animatronics, but if disney were to re-arrange the speakers like they did with the bears, it might not work as well.
And of course The American Adventure is the only animatronic show Disney's actually keeping up with.
Not to mention Disneyland's America Sings could be brough back up in a new building at Liberty Square. I don't know where tho, probably doesn't even have to be that similar style to CoP