RWBY.
Never said anything about just video game ips

.
Seriously though, after the series gets fleshed out a little more I would love to be a student of their badass academy, fighting monsters and shit.
Also, this:
Seriously, someone needs to make an hd version of Fenglee's game.
Maybe even a sort of in game class system of characters based on the personalities in the show. 'Brainy' characters can create weak points using guns and cannons, 'strong' characters can cut deeper through flesh and do more damage to joints and limbs, 'fast' characters can, duh, move faster and 'titan shifters' can change into titan form.
If someone invested a crap ton of cash and skill into it, maybe some destructible environments and stuff you could probably have a damn good mmo on your hands...
I say we could perfect it and successfully capture the vision of it in..give or take three to four more years of technology?
It can have three to four different types of servers.
Server one will be kinda like 'baby's first titan' type stuff - hit boxes are bigger, you can't permanently die, don't have to deal with stress and pressures and stuff + the ability to form your own squads and customize their logos and stuff.
Would be cool.
Server two would be a crap ton harder - colossal titans, tiny hit boxes on the titan's necks, perma death or a very PUNISHING death system. Titan shifters can't be instantly change, it'll take time and have a long ass cooldown, titans would move faster and be a shit ton more deadly.
Server three would be incredibly more punishing - you start with no walls, perma death is a given, you have collect materials such as sword metals and gas, build a town to keep everything up and running, start putting citizens/npcs in said town to produce the metal and gas needed but also need to kill titans with a low mortality rate so people don't start rebelling, need to keep titan shifter safe. Only one titan shifter allowed per town...
Shit tons of work, would still make an incredible game...