(Reuters) - SoftBank Group Corp said it has terminated a $3 billion (2.42 billion pounds) tender offer for additional WeWork shares agreed last year with shareholders, including ousted co-founder Adam Neumann, drawing threats of legal action from other board members. SoftBank said in a statement it is pulling out of the offer agreed as part of last year's bailout plan of the floundering shared-office operator. The statement cites issues, which include a failure to recapitalize WeWork's..