OK. I am uber excited about this since I live less than 5 minutes from the park and have been a season's pass holder for many years. I've been reading the posts and here are my two cents (for what it's worth).
I believe it will be record breaking but possibly only for Canada (not a hard goal to beat). It wont be for longest. Marineland holds that one with Dragon Mountain and with them selling the land north of the park they just don't have the space. If it's for height then they'll break their own record with Behemoth. Other parks have done that but i don't think they would do that for wonderland. Obviously we can already see it will be B&M and they haven't built one big enough to beat the world record. It may be for the most inversions or Canada's first launched roller coaster. That's my bet.
Being located where contruction already begun, Leviathan seems an appropriate name since it's in the "Medival Fair" part of the park. Anything "Dragon" is already taken unless, godforbid, they take down Dragon Flyer.
Either way, great endorsements from park reviewers on the inside scoop and I can't wait until tomorrow morning. Let's just hope I can see it from my 2nd story window like behemoth. LOL