I was unable to send an email using the email addresses provided for suggestions so I'm using this forum instead.
I think that you should design a Campylobacter bacterium. Campylobacter is the most common bacterial cause of gastroenteritis worldwide!! It's found in humans and many other animal species, most commonly associated with poultry and cattle. I can not believe you don't already have one! It's a gram negative bacterium so often appears pink in many photos, and has a spiral/wiggly worm type look about it. There must be hundreds of people world wide working on it, the market for a giant campylobacter microbe must be huge!!
I myself am currently doing a PhD on Campylobacter, and I would love to have my very own giant Campylobacter!!!
please please make one!!