They outright stated that it takes place before Jade is born. Depending on how far back it goes I guess it doesn't rule out Peyj or Double H, but still.

Also, Mario+Rabbids actually looks fun, but it could have been a viable game on its own without the rabbids. Maybe I'm just put off that this got a proper crossover with Mario before Sonic. I could see this same game with Badniks and Koopa Troopas instead of the Rayman spawns.