Christine wants to rejoin the band according to The Guardian

[SteveMacD]

Originally Posted by MikeInNV

That may be overestimating the effect that Christine's return would have on album sales. IYD did about as well as I could have expected, and better than many of the latest releases by Stevie's peers. I think a new studio album from Fleetwood Mac would fare similarly, even with all five members. The 70s and 80s are history. In order to "light up" the charts, they would have to sell to a lot of people young enough to be their grandchildren.

I think it all depends on the type of marketing campaign. I don't see it lighting up the charts, but I think they could still do well.