I think the two final Planeswalkers will be Strahd as the Red Black Planeswalker and Drizzt as the Green White Planeswalker.
For the tri colour rare B/U/W legend, I think that it won't be Bane, because I think Bane will be Mythic unlike Bhaal and Myrkul, Bane has always been more powerful, so I think it will be Shadowheart, Obscura colours suit her story, truckery domain and class. I think the Red Green White Rare MIGHT be either Wyll or Tiefling Barbarian or a Halfling Werewolf Bard. If its not Wyll then I think Wyll will be a rare red warlock with choose a background.
1) I may or may not add all the leaks from before today, depending on if I want to compute for where those showcase cards lie in the main set.
2) Because this is Commander Legends, the counting for the precons is within this main set. If enough people ask, I'll add the 300+ cards to that list.
I for one am requesting that you include the precon cards please.