OK, since we're potentially look at the last chance to do this, here's the current breakdown for the Isabelle in Smash teams.
Team Not an Echo
BGBW
IntelliHeath
ShinobiBk
Widget
Apopheniac
A.By
qq more
Radishhead
Nick Nehidnyk
Clov
Muzy
Team Echo
Brock Reiher
Geno
Heartskips
Regulus Tera
Not Liquid
Dark Cloud
MaitreWakou
Spinosaurus
Datajoy
WestEgg
Mario_Bones
RedAhmed
Nocturnowl
Pancracio17
alexi52
OricWindstar
nopressure
wildvine47
Lunar15
MrSaturn99
Baron von Loathsome
SieteBlanco
steviestar3
chrisPjelly
Team Losers a.k.a Team Think Isabelle isn't Happening
Clefargle
FiXalaS
BurritoBushido
Wil Grieve
Now, I'm a fair man so I have to tell you luck is on my side today because after three years of playing The iDOLM@STER Cinderella Girls Starlight Stage I finally drew a card I've been after for THREE YEARS! Not only does that mean Isabelle is likely happening, it also means Isabelle is likely going to be unique. So if you don't want Suzuho Ueda to be your avatar you might want to switch to the winning team.
Team Echo