Regardless of what you think of the series, Nintendo are going all out for Smash Bros Ultimate and you can't knock them for content.
Every character that has featured in the series so far, as well as a few new ones (so around 70 characters), just over 100 different stages (excluding the other variation), assist trophies coming out of your arse from various games, apparently 28 hours worth of soundtrack music (and the ability to turn your Switch into a music player for it as well), 8 player smash on all levels and a fair amount more as well.
Pity the poor sods who have to balance this.