Does the Bible support the J.W. belief that millions will be resurrected to get a second chance to be saved?

God does not cater to any particular denomination. Many people still don't realize this! God will resurrect the dead in Christ and the dead in Adam. The dead in Christ will be spared Final Judgement and the dead in Adam will be cast out. Faith centered in a denomination caries no weight with God. Faith alone in Christ saves us.