Ron,
How long would you wait for a command back home? It's going to be a seriously long wait at EK. Make sure you really think it through. I can't imagine they would upgrade more than 200 per year. With roughly 2,000 FO's ahead of you it looks like a minimum of 10 years. Once they start up the DEC process again (inevitable) it will slow down the internal upgrades. Mgt will blame it on a lack of training capacity and say their hands are tied.
Considering the skyrocketing cost of living and how hard it is to save anything on a FO salary are you sure you want to make that kind of commitment to Dubai? It would be a shame to burn out completely on the ME just as your command arrives. You will fly a widebody with a low cost carrier roster. Emirates makes a lot of sense with a quick upgrade. But once it's 7+ years the sacrifices start to outweigh the benefits.