There were many lingua francas of which French was supposedly the first global lingua franca. That changed and it became English (from what I understand). We will probably see another language become the lingua franca, so my question is: should it be English? Are there better candidates out there? Why / why not?
Again, English would make so much more sense as a common language than Arabic. There are more English speakers in Egypt alone than there are Arabic speakers in the whole EU.