Will be demolished at the end of this season and in the meantime the corner that is bottom right as the broadcast goes will be gone to allow foundation work to be done, meaning that our run at the ground fittingly ends with rivals Arsenal followed by the most successful PL club Manchester United.
Not official, merely a mock up but this gives an idea of what will happen between now and next season starting.
In the lead up to 2017-18 season, WHL will be destroyed and the last quarter of the foundations and stands will be built. Including the retractable astroturf for the NFL. 2018-19 barring no delays we shall move into a 61,000 all seater which will have the largest "kop" stand in England as well.
So..
2016/17 - CL at Wembley
2017/18 - All home games at Wembley in all comps.
2018/19 - Move into New WHL which will likely operate under a stadium naming rights sponsor as well as increased revenue from ticket sales, corporate money and a 10yr 20 game NFL deal.