BAR is clearly the one to beat, consistently able to sail aggressively, fast and fight back when things go wrong.
If the Cup goes to the UK (and that's still a big if) BA and Martin Whitmarsh said there would be a 100% Nationality Rule inserted for AC 36 so no more shopping for Spithill to other Teams winning the AC. Percy & Brittle from AR would likely come over to BAR to defend it and the Kiwis but especially the Aussies could have their own Team with Spithill, Slingsby and Langford heading a complete Australian Team.
Would like to see this sport be more encouraging of all people, so need to have mixed crews on every boat too (plus the 100% nationality rule).
It is the characters that make it interesting and this would give it, imho, give add much to this.