While searching for anything Oswald in the internet, I found this. It seems Mickey Mouse Clubhouse is already cancelled and season 4 will be the last season they make. And then I glanced at EPISODE 12.
So on the second last episode of Mickey Mouse Clubhouse is episode "OSWALD APPEARS"! It doesn't get more obvious then THAT!
I don't know if it's real or if it's fake since it's wikipedia. But if it's Oswald, I'm sold 100%. It made me think though, how would they introduce Oswald in the show, as a brother or a friend? It's probably the latter but I just wished it was the former.
(If only!) But anyway it's Oswald so fingers crossed and hopes are high. Maybe they'll show him doing the hot dog dance. I don't know it might be cute.
(or hilarious whatever)