A few things this game might have.
QR Reader- Like Mario Tennis Open I expect QR characters like Yoshi colors, Luma colors, Metal Mario and Dry Bowser.
Toad will be the host- Camelot likes using him as the host.
There will be some kind of online- Like a few holes or mini golf.
Courses
Forest Course
Flower Garden
Luigi Course
Galaxy Course
Mario Course
Bowser Course
Roster
Mario
Luigi
Wario
Waluigi
DK
Bowser
Peach- Will likely be conformed in the next update
Yoshi-Same as Peach
Daisy-Same as Peach and Yoshi
Diddy Kong-He was in Mario Tennis Open so he is likely
Bowser Jr.-Same as Diddy Kong
Boo/Koopa-I see one of them staying. However with Luigi's Mansion Dark Moon being recent Boo is more likely
*Baby Mario- I see Camelot using him once again
*Baby Luigi/Baby Peach- I see Baby Luigi in because it's the year of Luigi. However if Camelot does not add Rosalina they will likely go with Baby Peach.
*Rosalina/Luma- I know Rosalina is unlikely. However if anyone can make her a sports outfit Camelot can. But if they run short on time they will go with Luma.
*Wiggler- because of the Flower Garden.
Mii
Most likely cut
Birdo- I see Birdo being cut for some fresh faces
Koopa-Same as Birdo
Petey-He might get a cameo at best
Shadow Mario-I don't see him returning
I know Camelot will do some things I listed.
QR Reader- Like Mario Tennis Open I expect QR characters like Yoshi colors, Luma colors, Metal Mario and Dry Bowser.
Toad will be the host- Camelot likes using him as the host.
There will be some kind of online- Like a few holes or mini golf.
Courses
Forest Course
Flower Garden
Luigi Course
Galaxy Course
Mario Course
Bowser Course
Roster
Mario
Luigi
Wario
Waluigi
DK
Bowser
Peach- Will likely be conformed in the next update
Yoshi-Same as Peach
Daisy-Same as Peach and Yoshi
Diddy Kong-He was in Mario Tennis Open so he is likely
Bowser Jr.-Same as Diddy Kong
Boo/Koopa-I see one of them staying. However with Luigi's Mansion Dark Moon being recent Boo is more likely
*Baby Mario- I see Camelot using him once again
*Baby Luigi/Baby Peach- I see Baby Luigi in because it's the year of Luigi. However if Camelot does not add Rosalina they will likely go with Baby Peach.
*Rosalina/Luma- I know Rosalina is unlikely. However if anyone can make her a sports outfit Camelot can. But if they run short on time they will go with Luma.
*Wiggler- because of the Flower Garden.
Mii
Most likely cut
Birdo- I see Birdo being cut for some fresh faces
Koopa-Same as Birdo
Petey-He might get a cameo at best
Shadow Mario-I don't see him returning
I know Camelot will do some things I listed.