England coach Ben Ryan said: "The squad certainly looks to have the X' factor, packed full of game breakers and if we continue to gel as we have, then our impact over these next two tournaments should be considerable."
The New Zealand competition is on February 1 and 2, while the USA event is on February 9 and 10.
Meanwhile, Warriors trio Miles Benjamin, Matt Cox and Jonny Arr have both been included in England's 32-strong squad for this season's Under-20 programme.
Benjamin marked his full Guinness Premiership debut with a try against Newcastle Falcons while Cox and Arr have both been in impressive form for Warriors A side this season.
Cox is currently on loan at Doncaster Knights for whom he scored a try on his debut last Saturday.
The Under-20s start their campaign on 1 February against Wales at Gloucester.