>>7797283>1: Is the lore/fluff they came up with for the series any good?It's serviceable, some cool parts, some very uninspired ones. Overall pretty generic to give those who want a background, but I think most people have at least some headcanon changes or just ignore it outright.
>2: Are there any bootlegs out there that I should avoid (or alternatively, should buy for cheap customs fodder)?There's no bootlegs out there, but a lot of anons use stuff from other lines with their Mythic Legions. Pic related is a Marvel Lizard that some use as Lizardmen, some bought Fortnite's Ragnarok and some use figures from the Rampage movie as mounts. Also acessories from the old LotR figures seem to mix quite well. And there's a ton of custom heads and weapons specifically for Mythic Legions on ebay and Shapeways.
Also if you're from the UK definitely check out Kapow Toys for the new waves, what you save on shipping and customs might very well be worth the slightly higher prices.