So how would you guys rank the top 5 newcomers you're most excited to try out? For me it's probably:
1) Little Mac
2) Rosalina & Luma
3) Pac-Man
4) Robin
5) Mega Man
What is most compelling to me is how interesting a character's moveset & mechanics are, followed by how much I personally like the character. That's more or less the frame of mind I ranked everyone from.
Little Mac's ferocious ground game being balanced by really weak aerials is intriguing to me and the OHKO mechanic bumps him up to the top. I also loved the 2010 Punch Out game and think they've done a great job with all his different costumes.
Rosalina & Luma is a really great addition in my mind because, oddly enough, she is probably the most fleshed out character in the Mario universe, contrary to space-peach accusations. The way that they have not only implemented Luma with her but also tied in the gravity mechanics of the Galaxy games is just brilliant. Overall I think she has the most inventive implementation out of all the new comers, but falls just shy of Little Mac because I've wanted him as a character since before Rosalina existed.
Pac-Man looks to be very well implemented also, and I think Sakurai absolutely nailed the 3D design of Pac-man. Really clever that he transforms into his limbless arcade incarnation for his final smash and seemingly recovery move. The fact that his taunts and move set also include nods to many other 80's games is a nice addition as well. And of course, I love that the ghosts are part of his moveset. Still hoping for a Ms. Pac-Man alt.
Robin reminds me of Golden Axe characters in the way you could build up magic spells, and I love that. The thoron move looks devastating just like it should and frankly I'm really glad we got this highly unique character instead of Chrom as expected. Definitely one of the more mechanically inventive characters in the game without seeming too clunky. I don't have any experience with the FE series, though, so I have no personal connection to the character. It speaks well to how interesting his moveset is that he is still in the top five.
Mega Man is a great addition to the roster and they definitely nailed his 3d design, just as with pac-man. He blends in with the Smash roster much better than Snake ever did and I love how well his moveset ties into actual abilities from the games.