Nintendo: "Yeah, we know no one's going to get excited for this one, so we just thought we'd warn you ahead of time that the next Smash character is from ARMS."

If it's Twintelle or Min Min they'll be a lot of excitement.  Both characters have an insane amount of fan art that dwarfs the rest of the ARMS cast by far.  Plus the ARMS gameplay opens up a very unique moveset to draw from, so even casual Smash fans will be very interested if the characters done right.

I’m guessing Ribbon Girl. Should be Twintelle though.

I thought it'd either be Min Min or Spring Man with Ribbon Girl as an alt.  I think it'll be Min Min, but who knows with Sakurai.  He might throw half that roster on there.

There's speculation right now that it could be a large portion of the roster included as skins over the "main" character ala Bowser Jr and the Koopalings. But I do think Min Min would be the most likely especially since there was some poll / Arms tourney that she won last year that Nintendo was running.

Yeah, I know. I just think it's very telling that Nintendo went out of their way to avoid a repeat of the Byleth reveal by letting them know not to expect an amazing next DLC character.

I know I'm boring but I would personally choose Spring Man meself, that was my fave in the game. He's already an assist trophy though so I guess that probably won't happen.

That actually makes a lot of sense.  There's at least 8 characters that could use the same/similar models.  I think it'd eliminate heavies like Master Mummy or Max Brass and other types like Byte and Barq, but that's probably fine.  However, because Twintelle's fists come from her hair, her might would probably need to be different, so it could eliminate her, which would be the worst case scenario.  But then again, I don't think Sakurai has ever had an idea that wasn't "just crazy enough to work".