>>8130915TV and movie franchises will be hard for them to do largely because lego holds all the cards (and has licensing deals with all the big studios.)
Partnering with Netflix to make Witcher sets would be a smart move, you can tick a bunch of boxes off, fills the void of not currently having a fantasy/medieval line, you have a bunch of factions and iconic locations/storylines to pull from, you have monsters, and enough iconic characters to have hero figures for years.
Witcher also has a strangely large audience because there are already established books, games, and now a TV show/potential movies. Oh, and lego doesn't usually like touching mature or excessively violent franchises, so it's open for Mega to grab.
Anime franchises in general are going to be iffy because the biggest chunks of the fan bases are in Japan where domestic brands, chinese knockoffs, and Lego already have an iron grip.
You'd also have to pick an anime franchise that could appeal to normies buying building block kits for their kids, so that eliminates most of the franchises 4chan users would automatically suggest. Leaving mostly big normie appealing money printing franchises like Pokemon that have worldwide appeal to every generation.
Fuck it Mega probably should have picked up more Nintendo based franchises, some of their franchises are big enough to have hero figs and actual sets, like Mario and LoZ.
Also given Animal Crossing's current popularity AC hero figs would sell.
Now that they've proven Pokemon can move units, I don't see why they couldn't move other Nintendo sets/figures provided they can actually learn how distribution works.