Better, yes. But bigger than halo 3 no. Halo has a MUCH huger fanbase than smash.
LOLOLOLOLOLOLOL... wait not done yet LOLOLOLOLOLOLOL
halo sooooooo does not have a bigger fanbase then smash. in florida alone no matter where u went u could buy a copy of halo 3 on day of release and with ssbb u cant even reserve it any more. plus the first 3 days halo 3 was out only 100,000 people were online. now if u look at the numbers of systems sold xbox 360 roughly around 40 million units and wii 65 million. plus halo is rated M making it unavailable to a majority of people whereas sbb is either gonna be E10+ or T making it much more accesible to younger and older gamers. plus with ssbb its almost a guarentee u will find a charecter in the game that u like.
bottom line is halo 3 although fun pales in compparison to ssbb which is the most anticipated game of 2008 by far and most likely will be game of the year.
also if someone had a 360 and a wii and halo 3 and ssbb came out the same day i would guarentee that ssbb will sell 5x as many copies.
so ssbb > halo 3 by a substantial amount.