That music is from Audio Network, and has been used in countless games and TV shows besides LU.
Same flawed method? Dude, all we have is a loose description of the gameplay. You're really assuming a lot here, in addition to ignoring basic facts - we don't even know how much social interaction this game will have for starters, so far it sounds more like a single player focused RPG with social elements. Additionally, LLoCO has several things LU didn't have at all (tie-ins with other video games and LEGO media), or things it didn't have until far too late (focus on a heavily marketed and extremely popular LEGO theme with sets - not to mention Chima is shaping up to be even more successful than Ninjago).
TT provided input on LU and met with its designers to discuss ideas at least once. And again, it's not "LU music", it's stock music purchased from Audio Network. Additionally, you seem to have forgotten that this game was primarily developed by 4T2.
That's Tim Courtney in that video, and if memory serves me right, he was the guy running the KIC up until just before it closed, giving us teasers for LU and such until he and LEGOUniverseMaster finally let us in on alpha testing the game. He knows quite a lot about LU, more about its development than us.
Also, I just finished playing through the Speedorz game myself. Pretty fun.