In late 2018, LEGO Ideas celebrated 10 years of crowd-sourcing and as part of that continued celebration they've chosen to hold an extraordinary 10 year anniversary review, where all past not-approved projects were re-reviewed with 4 finalists being selected.
As of today a Fan Vote has been made public on LEGO Ideas where any member can vote for their favourite among these 4 pre-approved finalists. The product idea with the most votes at the end of the voting period will be turned into an official LEGO Ideas set, set to launch in 2020.
The voting period runs from today until the 4th June, 2019 at 3PM CET.
You can read more on the LEGO Ideas blog post.