Where are getting all these ideas from, who is telling you, what are you reading, please supply a source or at least a link or are they just wishful thinking plane spotters dreams!
WIZZ officially announced a few months ago that they had no plans to fly North America after 'rumours' on the internet suggested that they were intending on doing so. WIZZ also at the same time that they would continue to expand in Europe especially in the east and opening up new markets in Europe hence the new UK AOC and the establishment of Luton as a base with upto seven aircraft to be based at the airport in 2018.
With Icelandair, Norwegian, WOW and from next year PRIMERA entering the transatlantic low cost market WIZZ would be entering a cut throat market with no real benefit considering that they could use the same aircraft for upto three rotations from LTN.
I am also under the impression that the A321's that WIZZ have on order will not be able to make it non stop from Luton to the eastern seaboard of United States without making a fuel stop en route at Kevjavik making any such uncompetitive.
There has been no such suggestion regarding WIZZ ordering wide bodies let alone brand new and expensive A350!