I don't remember this being done, and a casual google search failed to find a 1v1 here for them, so here we are.
1. Double-Sided Gauntlet - I may be completely wrong on this, but I think that Escanor at his best (The One) can beat any version of Aizen. Since an answer as simple as that is no fun, let's make things more interesting:
- Starting with the weakest versions of both, Aizen and Escanor fight against each other in a series of matches against. The winner is allowed to fully heal and rest, while the loser is revived and allowed to start in their next distinct level/form for the following match. Essentially, I want to see where (if anywhere) the two have the best (most even) fight and where (if anywhere) one starts to pull away from the other.
2. Since When Were You Under the Impression vs Who Decided That - Who flexed harder/better in their respective series?
ADDENDUM:
Good point.
Let's assume that Aizen does have to do that at the start of each match (where it's relevant) in the first gauntlet.
Let's also, however, add a second gauntlet wherein this is already assumed to have been done (Aizen introduces Kyoka Suigetsu and I suppose Escanor introduces Rhitta in response). What changes?