Other than updates for Pokemon, Bayonetta 3, AC and Luigi's Mansion, I don't know what to expect. We might get a decent amount of 3rd party ports, considering it's about damn time some of them start getting their act together and put at the very least something there "ejem" Atlus "ejem".
One thing's for sure. With Sony skipping E3 and Microsoft shuffling their hardware strategy, Nintendo is going to hog all of the attention. Let's hope it's for the best.