I'm sure EK have more lucrative A380 destinations than MAN
Its hard to tell with EK what they actually look for in an A380 destination. Those exact words were what people were saying before EK launched the first A380 service.
However, for cargo puropses, a new B773 frequency is needed, as adding just a 2nd A380 alone would eliminate all cargo from MAN, so, if they did add a 2nd A380, a new cargo route or 3rd daily would be needed anyway.
I can see the EK21/22 being added first, then the 2nd A380 next year personally.