https://onedrive.live.com/view.aspx?...C7uZHAmcVGWgwE
That is a tracking of the public votes (143 so far). In 2015, that tracking was generally withing 5% of the actual % the player ended up getting (with one or two exceptions).
As such, it looks like Griffey and Piazza might be locks this year, and Raines and Bagwell are looking pretty darn good this year as well.
Tom C