so about how early should i be showing up if i wanna be up in the front of the line?
No one here's got a crystal ball, it's a tricky question to answer. Line ups usually work where theres a few people (read about 10 or so) there by early early morning, then around 7 you get people in force. By the time the store open you're usually down to jersey street and beyond.
Really depends on what's dropping too. If it's a big drop like this usually it's a little less hectic versus something like a pair of nikes (people there by 10pm the day before)