There's no real conclusive answer on what's going on with Pauline and the timeline. I think Nintendo (questionably) left so many clues pointing in different directions to make people reach their own conclusions.
My personal interpretation is that Pauline Jr. here is either the daughter or niece or something, of regular Pauline that we've always known. Mostly based on lines about how her grandmother was a singer, the family dress, etc...
Bananza 100% unequivocally takes place after all the mainline DK games though, that's pretty concrete.
http://www.dracanea.com
NB, curry fan, Top 10 lister, indie dev, gym hitter, musician, et al.