If it helps, Mario vs Sonic Rio got announced.( ͡° ͜ʖ ͡°)Played the first one - didnt like it. Not a big fan of sports games. Only Mario sports game I actually got into was Mario Tennis lol.
I think they just needed to get all the japanese games out of the way before e3.
Hopefully we hear new announcements about something....more exciting and not niche.