Re alt 1 and alt 2. Would love to see a European component to either. As was pointed out there are a lot of European carriers that will hopefully co-operate that have not been involved in the past. Ok so LH owns most of them.
Flying to GRU in Y on a charter for 12+ hours does not sound like a heap of fun, and TAM does not map into fare buckets that will deliver full FF points into most other *A programs.