@Haywire yes we'll use the shooting through barrier rule, which gives a defense of roll of 6d (as I forgot the malus to the bodyguard rolls) to try to reduce the number of net hits. Once you have rolled that, and if there is still enough hits for your character to be hit, we'll go through the barrier. Hopefully, as you only need 3 hits, you may be able to dodge (especially if you can still post edge the roll). If you roll less than three hits, please roll a soak test for the vehicle (Body + (Armor - 2)) - and then your own soak roll, in case the Mystery Machine can't stop the shot.
Below I'll assume that Waywalker somehow survives and moves forward with your actions.
Sidenote: you often uses teamwork from an Agent to get MARKs - which I'm fine with, but I don't think this RAW nor RAI. Indeed, discussing about sharing MARKs between decker and agent, and technos and sprite, in a recent thread, somebody pointed out that MARK *cannot* be shared between a Decker and its Agents (same for technos and sprite). So it seems unlikely that an Agent could help a Decker get a MARK. But no worries, we have allowed during the all game, so no last minute change. Just keep in mind, to clarify that, if you build a decker and jump on an other game...
For the rigger, inert inside the van, the bodyguard's shot was a close shot, but Waywalker does not let that deter his will to fight and survivre. Still deep in VR, the hacker throw all his got to the Plutocrat's icon, trying to get a MARK on it at all cost.
Note that the chopper is running on Saeder Krupp grid, so I'll give it an extra 2d (as you did not know and include the -2d to your own dice pool):
Johannes chopper resist brute force attack: 10d6t5 3
I assume you also want to use it to inflicts one ("If you wish, you may also inflict 1 DV of Matrix damage to the target for every two full net hits, if thetarget can take Matrix damage, which is resisted with the target’s Device Rating + Firewall"):
Chopper resist matrix damage: 8d6t5 1
Sadly, it resisted (barely) the one damage.
The flow of invalid data and agressive request flying from Waywalker's persona quickly finds a weakness in the helicopter defenses, giving the decker the "in" he was desperatly going. Diving thru the device matrix echo, the decker also to try to run as much chaos as possible, but the Saeder Krupp runs a tight ship, and their chopper is already patched against many of the vulnearabilities the decker tries to exploit.
Johannes Bodyguard resist Influence from Rex's spirit: 7d6t5 1In the meantime, in the meatspace, the Bodyguard behind a pile of junk, who just shoot at Rex, suddenly hit the dirt and take cover, mutterring to himself:
"Frag this! I'm not pay enough for this shit !"In the meantime, Rex hears metal screeching behind him - something just open, or actually tored apart the backdoors of the Van
So now, third pass:
(??) Most likely Waywalker's drone - still on suppressing fire.
(3) Bodyguards next action: one ducks and hides, under Influence, the other one apparently does nothing (nothing as obvious as shooting at you)
(1) Spirit of Man's action - @Jack_Spade if I'm not mistaken, Spirit may have an other action, right ?
Now, let's do the new turn initiative order - I'm keeping the initiative of everybody, expect Rex's because it changed some much this turns, I don't know what is its current value 
- I also may need the one from Waywalker drone, unless they keep spraying bullets.
(??) Most likely Waywalker's drone - if they stop their fire, but their actions would be then dealt with after Waywalker directive.
(??) Most likely Rex
(23) Bodyguards next action
(23) Whoever/whatever is ripping apart the back of the Mystery Machine
(21) Spirit of Man's action - waits on Rex
(21) Waywalker next move
(3) Johannes in full defense
Johannes Initiative: 1d6+8 13
Whoever/whatever is ripping apart the Mystery Machine: 2d6+15 23
