This is one thing that I am quite curious about as well because IND
is my primary airport. The website is lacking in information, and there don't seem to be all that much info out there about this expansion. All I have heard about is the whole expansion of the cargo area so fedex can have its hub.
Also I want to know how they expect to complete the project with only 974$ million. They are doing a lot of work, including moving I-70 and creating the terminal, so I am doubtful that the terminal will be complete this decade.
If you have never designed an airplane part before, let the real designers do the work!