I think that Goku and Vegeta would have a chance goku would be a ssj3 vegeta would be pushed to the point where he would become a ssj3 and then they would push vegito to ssj2 then goku and vegeta would fuse into gogeta ssj3 gogeta would mess with vegito and vegito has to go ssj3 in the end its a final kamehameha vs big bang kamehameha and vegito would win barely (because final flash>big bang attack and because final kamehameha>big bang kamehameha)