Q: Does Forgotten Monument work the same as Tianna? Will it receive similar errata?
Forgotten Monument works differently from Tianna, and we agree that's confusing. That's part of why we decided to issue errata for Tianna (and not for Forgotten Monument).
Forgotten Monument completely prevents the process of scoring there. That means no conquer triggers, no hold triggers, and no points from doing those things. "Extra" points such as those from Renata Glasc, Mastermind are unaffected. You can still gain control of the battlefield following a showdown-you just can't conquer it.