There has been no announcement where the initial 350 routes will be flown as yet.
1st a/c arrives Feb, 2nd in March, 3rd in April, so highly unlikely that a daily flt to Man would happen at that time, let alone 8 a week.
The last 777 is delieverd very soon, increased flts to Adelaide, Madrid starting next year, Boston and Dusseldorf started, so the upshot is, at this time, there are not enough a/c and/or crew to start flying daily to MAN. It may or may not happen I don't know, if it did I would not expect to see it happen before Jul/August time 2016.
I heard the rumour the Monday evening flt was a freighter not a pax flt, but unsubstantiated at this point.