Naughty person AviationNE.
Highly unlikely that the EZY contract will chamnge in the near future as it has some time to run and is not 'up for negotiation' unless EZY start invoking termination procedures which would cost them cash.
As ever, the who will move to whom merchants are at it within the Airport, the vast majority of them have ABSOLUTELY no knowledge of the contractual state of anything they talk about. Nothing new in this, it has been happening for years.
If the airport want to bring in a 4th handling company (do not forget their own brand of Samson) and they want it to operate at the main terminal they will have some work to do in terms of infrastucture changes. Landside and airside offices are plentiful(?); GSE storage space available? etc.
Never say never but there would be some issues to resolve.