(Reuters) - SoftBank Group Corp is considering pulling out of a $3 billion (2.5 billion pounds) bid to buy additional shares in WeWork, because it feels the office-space sharing firm has not met the conditions for the deal, people familiar with the matter said on Tuesday.SoftBank's U-turn would be the latest blow for WeWork's investors, which last year saw the company's valuation plummet by tens of billions of dollars amid a failed attempt to go public and a cash crunch that threatened it with..