The beta has been changing so much that I might be wrong about this, but last I checked you can’t do two Airball dash cancels in one combo; which means the stuff you saw at EVO is no longer possible.
As for your specific combo, after the second launcher don’t do both j.lp and j.lk. Instead do either one or the other, then do j.MP j.MK xx Airball xx Super. That way you can do another air string later in the combo (which should start with either j.LP or j.LK, depending on whichever you haven’t used yet). You’ve already used up your OTG before the Super (which should be Gregor Samson), so you’ll need to catch them midair with a s.MP (into s.HP, j.LP/LK j.MP j.MK xx HK Airball) after the Samson super, to finish the combo.
OR, if you don’t wanna deal with all that, and don’t mind spending another meter, you can do Airball xx Gregor Samson, then hit them with your DP super on the way down. Still, I’d try and learn the non-metered Samson followup.
Edit: Actually, you haven’t used an Airball cancel in this yet, so you could do the suggested air string after Gregor Samson, then at the end do HK Airball air-dash cancel, s.LP s.LP s.MP s.HP xx DP super (or something like that. Even just a normal DP or Hairball if you wanna save meter)
Edit2: The s.MP after Gregor Samson is a LOT easier if you use LK Hairball before Samson (puts the character higher so they have farther to fall, giving you more time to dash into s.MP range). so your original combo should look like this:
c.LK s.MK s.HP, j.MP j.MKxx j.MP j.HK, c.LK s.MK s.HP, j.LP j.MP j.MK xx LK Airball xx Gregor Samson
And the extension would look like this (depending on the character):
c.LK s.MK s.HP, j.MP j.MKxx j.MP j.HK, c.LK s.MK s.HP, j.LP j.MP j.MK xx LK Airball xx Gregor Samson
Dash s.MP s.HP, j.LK j.MP j.MK xx HK Airball air-dash cancel, s.LP s.LP s.MP s.HP xx some special/super
Final note (I promise): Depending on the character you’re comboing, you may or may not have used up your OTG before the first Gregor Samson. If you’ve used up the OTG you’ll need to do the s.MP catch. If you HAVEN’T used the OTG you can just use c.LP s.MK s.HP and go from there. It’s a lot easier that way.