I'd rather they just make an open-world Lego game like Lego City Undercover, but set in the Wild West... then one set in a Lego Boarding school. Follow the route of Rockstar to the letter :P Completely serious about the Wild West idea, though, because I bloody loved the Western Lego sets when I was a kid.
I kinda wish Traveller's Tales would actually make a LEGO game. Like, everything is lego, unlike what we have right now with realistically rendered landscapes and only some certain parts that are actually lego. Either go all the way or not at all.
I know I'll get flogged for this, but I'd have fun with a LEGO Matrix.
What would you like to see next from Tt?
I would like one that wasn't licensed. Just collecting a crew of roughnecks from their various Pirate, Ninja, Castle, Space, Wild West, even Town, etc. Have a crossworld/times storyline and go to town in an open world setting.