I'll join ya malfactored with daylight warrior lvl 47 mm.
I want the badge.
Robo GN can be there 
Hmm... better make sure y'all got a couple of Shivans handy. Even after the recent patch, AV's got enough regen to make taking them down with a team of 5 rather chancy (And it doesn't look like we'll have a team of 8...) without regen-debuff.
And we will, after all, be facing two of the kind...
Fu Leng, lvl 47 Brute, will be there
I just heard that Green Witch will be joining us as well, so providing that everybody who's said they'll be there, actually show up (extremely unlikely, but a theoretical possibility), we've got the minimum team at least.
I'd like to once again remind you that bringing a Shivan Shard will probably be a VERY good idea - as well as any other useful temp-powers you can get your hands on, such as Warburg Rockets. If half of what I've heard about Bat'Zul is true, he's an extremely tough nut to crack, so we'll need all the help we can get.
Okay, we've got the minium number for it... when we start, I'll do some random calls for interested parties to join - but failing that, taking down Bat'Zul with just the 5 of us SHOULD be possible - at least if you all followed my advice and brought Shivans. And maybe a few nukes. 
Can't get Warburg with Robo GN 
May try pick up some Shivans later but trying for 26 atm...
i'll give this a go
Brutes Maximus lvl37 brute
My mastermind would like to come in on the action too if there's no problem with it. 
If there is a space can I come along with Dr E Genius(lvl 45 MM) as I'm in need of inf. Already have the badge so will let people after the badge have priority.
Doesn't look like we'll be crowded, so come right along - at this point, even if everybody who expressed interest shows up, we're only on 8. So yeah. See ya in an hour...
Well, although not everybody showed up, we went ahead and did it... Bat'Zul wasn't easy, but once we'd gotten him outta the lava, we basically had him. Got a little tense right at the end when he fled into the lava again, but it was too late for him...
Now, I NEVER want to take my mastermind into another lava-map. >.<
Thanks everyone for such a great job! We did it with a team of 6, in which 4 were Masterminds. Imagine the mess with all those pets jumping into the lava lol.
Anyways, we did it fast and with almost no calsualities. Now I finally have all those SF Badges
Oh yeah, Fu Leng was great - I recall a particular situation in the last mission, where we'd just jumped over a river of lava, and right into the face of a bunch of demonspawn - and virtually ALL of the 16 henchmen we were dragging along with us, ended up in the river. Fu Leng singlehandedly held off the demons - with a bit of help from Green Witch - while we masterminds were desperately resummoning our pets... looked really dramatic and heroic.
Too bad he's supposed to be a villain.
Virgil Tarikoss SF - Beast Under the Mountain. Minimum team of 5, minimum level 15. Rather short SF, only 6 missions. Now that AV's and Hero's are beatable without massive regen-debuffing again, I thought it was about time to take a shot at this thing.
Sunday 9th, starting early afternoon, say about 2 PM BST/15:00 CET?
I'm there on my level 29 Mastermind, Vrykola. Who's with me? Let's see some hands, folks...