One of the scenarios suggested was this:
Or Dr M, after ensuring that Najib has been dethroned from UMNO's leadership, may lead Bersatu back to UMNO. Then BN (with Bersatu) could ally with PAS, and based on the current numbers, they would have 109 seats. They just need 3 more seats for BN to be back in power. This could be from defecting PKR or Amanah MPs (DAP would be very unlikely), or the independents, or STAR, or Warisan.