Time to analyze the snake pick (Locke style):
1) Darius: Good choice. FIN leader paired with economic trait means all set up for mass teching. Teammate can cover expansion.
2) Bismark: Non-FIN leader for 2nd pick, strange. Decent leader with good traits but better options available for 2nd pick IMO.
3) HC: Good choice

FIN leader along with IND with only 4 teams. Little synergy, but both traits are very strong.
4) Mehmed: Fairly poor pick. EXP is ok, but ORG is poor choice. Clearly chosen for ORG synergy with Sumeria with Darius gone, but leader still sucks.
5) Sumeria (+Mehmed): Really? Sumeria as 1st civ chosen?

Techs are good but UU is worse then normal axe and UB arriving earlier and slightly cheaper makes little difference. Better civs available even considering ORG synergy.
6) Maya (+HC): Great pick!

Best non-India civ in the game that starts with Mining, excellent UB and alright UU.
7) Korea (+Bismark): Same starting techs as Maya, but much weaker civ. UU can't kill, UB is alright. England is much better overall, but Korea start with Myst which is necessary for Stonehenge. Still a decent Mining civ.
8) HRE (+Darius): UB pairs well with leader, but even though it's Immortal the synergy is overrated. Cost is worst starting techs in game, and fairly poor UU. May work out for them but big mountain to climb thanks to techs.
9) England (+Darius/HRE): Great choice. England is 2nd best Mining civ after Maya, and UU and UB are both decent.
10) N.America (+Bismark/Korea): Terrible civ.

Techs are ideal (Agri/Fishing) but everything else sucks. UU is not great and UB is comparable to PRO, which is a joke. Why not pick one of several good Agri/Wheel civs? This team clearly wants Stonehenge with free UB everywhere, Myst starting tech and best leader for it, but getting crappy results from snakepick thanks to it.
11) Gandhi (+HC/Maya): Fairly decent choice. Only SPI civ in game, and PHI is decent in teams and paired with SPI. No expansion traits hurts less on Immortal then lower difficulties. Probably better leaders available but not bad choice at all.
12) Elizabeth (+Mehmed/Sumeria): Pretty good FIN leader, but not with the picks this team already had. FIN wants mass expansion, but so does ORG Sumeria. PHI doesn't need mass expansion to be useful, but FIN does. Why not take Suleiman and support ORG Sumeria better? Otherwise pretty good pick.
13) Rome (+Mehmed/Elizabeth/Sumeria): Pretty decent Mining civ considering 4th pick. UU is powerful but no synergy with either Leader means useful for defense only. UB is worthless to PHI leader. Probably the best Mining civ left, should've taken Maya when they had the chance.
14) Egypt (+HC/Gandhi/Maya): Great pick!

Awesome UU and UB synergies very well with Gandhi. Techs are very good aside from no fishing. Hard to go wrong with this.
15) Victoria (+Bismark/Korea/N.America): Decent pick. FIN leader paired with best expansion trait available. Could do much worse then to pick this.
16) Joao (+Darius/HRE/England): Great pick for last leader!

2 expansion traits combined means mass expansion. Paired with best teching leader means quite a combo. If they can get past bad start this combo will rock.
Someone else want to analyze the teams as a whole?