Storylines surround star-studded Indy 500

(Photo credit: Mark J. Rebilas-USA TODAY Sports)
INDIANAPOLIS -- Preparation for Sunday's 108th Indianapolis 500 certainly has been a high-profile work -- from a Penske Racing sweep of the top starting positions to the impressive IndyCar debut of NASCAR star Kyle Larson to the possibilities that the great race could produce its all-time winningestdriver in Helio Castroneves.

When the 33 cars roll off the grid Sunday at 1