I think that now that all of the satellites are dead and that Lilith's connection to Punk Records has been severed, Punk Records can be destroyed and the Mother Flame can explode
Maybe this was all planned by Stella and he knew that if a satellite survived, he would leave with the Straw Hats
If you look at Stella's plan, he did not plan that one of his satellites would survive anyway so better just give all of the information and shock the world with the truth so it all makes sense for him to make Punk Records explode, which would kill Saturn
Don't ask me why I got this edited picture (only one I could find) but I did find it funny
Also this goes perfectly with Tamago Jiken, the Egg falls and the Chicken dies
Punk Records explodes, Saturn dies