Certain carrier in the UAE withdrawn some A330's very soon..
Short Haul they will have to place an order for something within 12-18 months (I expect Airbus NEO) but IB A319 would be good for short term.
I understand that EK are withdrawing some of their A330s from service and returning them to their lessors, but don't they use RR engines which wouldn't fit in very well with EI's CF6-8 engines from GE. Also hear that the interiors of the EK A330s are in pretty bad nick.
I expect we'll see an order for the NEO fairly soon, or an agreement signed with a leasing company. I'm not sure what the time at the minute is from order to delivery for the NEO, but I'd say it must be a fair bit away.
IB indeed could work with some short 2-4 year leases, all their A319's are leased as far as I know and use CFM 56-5B4 engines and the A319 would be the ideal bird to open up some routes, or just improve yields on current thin routes.