So much for a cemetery being "sacred ground." Why were remains dug up previously in the first place? "Rest in peace" means just that. Re-bury the bones that have been found and preserve the site as a cemetery, as it was originally designed.
I think the huge number of bodies still in the graveyard warranties their staying put.
Or, the developers could alway rename their project "Graveyard Condos--Where the dead never rest." That should be a great marketing tool.