Bellew's been talking about how much he doesn't really want to box and just wants to secure his families future for a while now. I doubt he'll bow out with another huge payday looming, even if that was as good a swansong as he could possibly hope for. Him trying to talk up a fight between him and Joshua was worrying. He has no business in the ring with any proper heavyweight. Hopefully he realises that.
As for Haye, well the best he could hope for was to be a lucrative stepping stone for Joshua. Doubt that's even an option now, and that's probably for the best. I for one could happily live without hearing his pre-fight bad guy awfulness ever again tbh.