Ah A1GP all over again, no seriously -
A European group called World Series Operations with links to the A1GP World Cup of Motorsport in 2005-09 and subsequent attempts to relaunch the championship is known to have put forward plans for a winter series under the IndyCar Global Challenge banner.
Boy would I love to see this happen. Andretti is in support of this, which shouldn't surprise anybody.
Clearly there is some interest in a winter racing series. GP3 runs a series in Asia in the winter time, mostly in the middle east. A1GP is where the idea for a winter series in modern times was born and did very well. In fact when the merger between IRL and CCWS happen and the Surfer's Paradise round was dropped, A1GP picked it up.
That was was eventually taken over by a V8 Supercars event that features usually Indy Car drivers sharing a car with V8 series regulars.