I had to look it up as I am not familiar with this plant, but from what I see, and from the name, a tomatillo is not a tomato, even though it may look a bit like one. It resembles mostly the physalis fruit and plant. Yellow, orange, and red peppers are same plant as the green pepper, just different ripeness stage. Don't think they will add that, but would sure be nice to have and be able to harvest them at different ripeness or growth stage. Personally, I am happy for all new plants they add, especially if they make them look like the real plant instead of the generic bush that came with basegame. I would love if they added cabbage and cauliflower, leeks, sunflowers as harvestables, corn, sugar cane or beets, chestnut or walnut trees.