Delta Air Line Pilot Recruiting (via their FB page) did an online webinar with some Q+A back in April and this was on their FAQ:

3) When is our next in house recruiting event?

We haven’t finalized plans for our next event yet, but keep up with us here or on our Twitter feed [MENTION=78423]DeltaP[/MENTION]ilotjobs, as they are our platforms for making those announcements.

Good luck!