Board Thread:Young Justice News/@comment-3974095-20170209201908/@comment-5188108-20170605125840

Plenty of actors voice multiple characters. No reason to assume he's doing Wally.

I don't think Jesse being there as indicative of anything. Even if Nightwing is still on leave when the series resumes (and given that we know there's another time skip I wouldn't assume that either), that doesn't mean Dick/Nightwing wouldn't appear - Kaldur, Artemis and Wally were all off the Team for the bulk of season two, after all, nor was Red Arrow a member for most of season one.