INDYCAR announced late Monday that they will not be replacing the cancelled season opener in Brazil with another race. They did, however, leave open the possibility of a non-race event on the March 8th date.
The press release:
INDYCAR has explored several possibilities in an attempt to find a replacement event following the cancellation of the March 8 race in Brasília. Due to the lack of time for suitable planning and the limited number of options, the series has concluded it is not feasible to organize a replacement race on that weekend. INDYCAR will determine other opportunities for its teams and drivers at that time following a review of the current testing schedule.