There are rumours of new bases all the time. Most of the rumours that appear on here are usually wrong. Very few people were predicting Milan MXP as a base before it was announced. There have been rumours of Spanish bases for the last three years, but nothing announced to date!
Rumours I have heard circling the crew room this month include a new base in South Germany and a new base in Poland. Who knows? We will see.
If anyone wants a job at a new base, you best bet is to apply now and get inside the company. Internal staff will always be transfered into a new base first before easyJet recruit externally.