First is the Indiana Comic Con, March 14-16. Show details here.
Second will be Emerald City Comic Con in Seattle, March 28-30. Their website.
My understanding is that the Helheim trade paperback will be at ECCC, as will Cullen Bunn and Nick Fildari, so you can meet the whole team.
Commissions will be done on a limited basis at the cons. You should e-mail ahead if interested. joellejonesart [a] gmail
Speaking of art, Cadence has redesigned their website and you will now find all remaining Helheim art listed there, including the pages from #6, which have not been on sale before. Cadence is the only authorized dealer of my work, so it's the one place to buy art that comes directly from me (unless, of course, you literally purchase it directly from me).
And keep your eyes peeled for announcements coming soon about future projects!