I realize that originality is an important part of it. It's kind of cool, it makes Super Smash Bros. its own game. At the same time, though, Smash Bros. is a franchise that is based on fan service. Super Smash Bros. Melee was just a glimpse into what could have been the most epic crazy fantastic Nintendo single player crossover ever. The subspace emissary seems to tap into that potential, but the Nintendo crossover part is a bit lacking. It needs a balance between originality and fanservice, and so far it doesn't seem to be reaching that balance.
Goombas aren't the only enemies I would like to see. What about fighting knights and soldiers from Fire Emblem, or starmen and hippies from mother, pokemon, or kremlings? There are tons of enemies to choose from. It's not just the enemies, either. It's the levels and the cinema scenes. On that side of things Kid Icarus is the only franchise that seems to get representation in Subspace Emissary so far. What about a Mushroom Kingdom level? A level based off of Mother would be pretty awesome, a wacky Wario Ware level maybe, or a Metal Gear level. Most of the levels so far seem to be pretty generic, don't get me wrong, they look nice but they're generic.
Anyhow, I hope there is still a lot more to see and there probably is. It's just not going in the right direction so far.