So far we've looked at two categories of Jelly Belly flavours that I think should exist, yesterday it was beans based on Japanese snacks, the day before Middle Eastern spices, today it's about working with other candy companies.
I seem to remember Jelly Belly having a few bean crossovers with soft drink brands in the past (and maybe present). I'm pretty sure I've had a Dr Pepper Jelly Belly before. I think expanding this idea is a great way to go. Why stop at drinks, why not work tie inns with other candy brands. I assume that Jelly Belly isn't really in competition with Kit Kat, as they're completely different kinds of candy. This difference is what I think would make candy bar themed Jelly Bellies work so well. I think visually you could decorate the beans with the package colour to make them more distinguishable.