Regarding Mitsui Fudosan's 8th and Hope proposal, I found out the following (more at the link):
After defeating three appeals last July,
two new appeals (one by neighboring property owners and one by a labor union) were filed in October. One of them challenges the project's CEQA compliance. The other claims a violation of downtown design guidelines because the project will come within 40 feet of a proposed structure next door. All appeals must be resolved before the Planning Commission can approve the project.
So . . . claims of the project's demise are greatly exaggerated, and the cause of the delay is not the fault of the developer (or the city). It's nuisance appeals from private parties.