After the 2011 edition of the Paris Air Show was dominated by the A320neo, this year seems to be the show of the Widebodies. The usual suspects as Emirates and Qatar will surely play a major role here, as we can read here (as for Qatar) and here (as for Emirates). Although the B777X is not mentioned in the first article we can be sure that Qatar will also be one of the first customers for the then largest twin. Probably not only the B777X will get it's first orders but also the B787-10 will see a formal launch with a first wave of orders. Airbus, of course, will try not to stand by and have it's own order book filled, mainly that of the A350.
The future of the A380 could play a role in conjunction with the launch of the B777X as the seat costs of the double decker will come under pressure once the B777-9 will enter service. So we might hear what Airbus has on it's plate for 2020 and beyond, as also Ben Sandilands suggests - although he thinks that might need a little bit more time.