It'll be Rooney - for reasons wisely set out earlier in this thread by
@Milkman
If for some reason that falls apart - say Moshiri continues his recent trend of appointing wizened proven winners - then it will be Mourinho. That choice would show that there is an ever-deepening split in the board and that Moshiri is essentially deciding things in cahoots with Usmanov and in spite of Kenwright.
I'll be surprised if it is anybody other than those two. The Martinez shouts are so ludicrous as to make Rooney semi-palatable. Bill will know this.