basically it is the 33 drivers who started the indy 500, but with some what ifs.
Here's the what if of 2016.
Jenson Button(R):
What if the 2009 world champion skipped Monaco GP to race in 500?
Alex Zanardi(R):
He is trying to make a comeback on IndyCar. Will he win?
Danica Patrick:
the 2005 ROTY returns from the Nascar to race on indy.
Lance Stroll(R):
Known for his wealth more than his Skills, Stroll arrives to the Speedway trying to become the Youngest 500 Winner.
for the 33 qualifiers:
https://en.m.wikipedia.org/wiki/2016_Indianapolis_500