Unlikely. One of the requirements is daily direct flights to/from Seattle. Indy does technically have that but it's exactly 1 flight with poor timing for business considerations. They list a few other destinations as must-have nonstop flights, but I'm not sure how good those are. They're also putting a lot of stress on public transit, which is pretty abysmal in Indiana. They also don't want to sacrifice on some of their values surrounding renewable energy, recycling, composting, etc. I lived in Indiana for over 10 years and can't say I've ever seen a compost bin at a restaurant, and can count on one hand the number of places with recycling bins (for public use anyway, most places would recycle their boxes at least).

That said, moving some place in the midwest would be very interesting. Amazon has a lot of employees that are from those areas, so if they want to start moving teams it would probably not be too hard.