Too soon to say. The thing is that Maulana and Nawaz are on the same page, that’s not because of ideology, but their predicament. Both have all to play for and nothing to lose. Hence the broadsides against the establishment, and the threats to resign, along with calls for elections.
PPP are different, they gain nothing from an early election, they don’t want to be anti-establishment, only anti-Imran, and they certainly don’t want to resign or do something that might cost them their only hold on power, which is Sindh.
As for why I’m saying it’s too early to call what PPP might do. In order to stick with PDM’s more hawkish plans, PPP will require major incentives such as seat adjustments in Punjab. Or some other compromise. We could possibly even see a situation in which they willingly join the long march, but refrain from resignations. Whatever happens it will be decided in negotiations. PPP’s exact role is uncertain and not yet decided upon, it depends on how much the PML is willing to allow in Punjab for their participation, but they haven’t left the PDM as yet.