It is obvious that Super Mario Galaxy will be at the very least second on gamerankings.Its current score is 97.3%
Ocarina is 1st with a score of 97.6% and The Orange Box is third with 96.5%.
Galaxy will need a really bad review in order to go lower than second place.On the other hand,if it gets a few more 9.8-10 scores then it can surpass Ocarina and get to own the title of being the best game ever.