If you understood the different Emirates, you would understand that they are very competitive and it is unlikely we would see a merger between EY and EK.
While they are at seperate airports yes...
But remember, the rulers of both Emirates have close relations with each other (both branches of the same family) and have common interests, in fact so close Abu Dhabi "bailed out" Dubai when the latter has issues with their debt
All I am saying is that EY is better off merging with EK once DWC opens than investing in Air Berlin