NEW YORK (Reuters) - Stock futures fell sharply on Monday as expectations waned that a European Union summit this week would help soothe the escalating euro zone debt crisis. A German government spokesman said the EU will probably not take any decisions on Greece in the upcoming summit, in which Greeks were hoping to ease the terms of their bailout. Greece's new prime minister and finance minister will miss the meeting scheduled for Thursday and Friday, due to illness, which also delayed a visit to Athens by Greece's international lenders. ...