Founder here of a company that attempted to do an acquihire Hail Mary.
Going to be frank with you. 1.5 months is not enough time. Go through the motions and meet with FAANG, but for all intents and purposes it is too late. There’s very little incentive for BigCo to buy a dead company.
Tell the team now, pay out their salaries for next 1.5 months but have them focus full time on getting new jobs. That’s the best you can do for them.